content/eip545b_5.rst

Tue, 28 Aug 2018 15:05:01 +0200

author
David Douard <david.douard@logilab.fr>
date
Tue, 28 Aug 2018 15:05:01 +0200
changeset 104
8396e709bde5
parent 84
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permissions
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improve hgignore

84
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1 ========================================
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2 EIP 545B RF Frequency Counter - Part 5
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3 ========================================
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4
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5 :author: David Douard
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6 :Category: Electronics
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7 :Tags: test equipment, RF, EIP, 545, 545A, 545B, 575A, 578A, counter
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8 :series: EIP545B Frequency Counter
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9 :series_index: 5
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10
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11
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12 Thanks to HighPrecision_, I've been able to get a copy of an old version of the
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13 EIP documentation *"Additional Service Information for 5XX CW Counters"*. It's
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14 unfortunately unavailable online, still, it contains a lot of valuable
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15 information.
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16
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17 .. _HighPrecision: https://www.eevblog.com/forum/profile/?u=116109
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18
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19 The part dedicated to verifying the Band 3 Microwave Converter (A203) is as
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20 follows.
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21
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22
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23 Functional verification of the microwave converter
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24 ==================================================
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25
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26 If you are experiencing any problems in band 3 mode of the EIP 53X, 54X or 57X
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27 counters, the following procedure can be used to determine whether the problem
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28 is in the microwave convertor or the basic counter.
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29
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30
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31 This note describes the verification of the convertor into functional blocks,
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32 these include:
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33
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34 A. VCO
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35
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36 B. YIG filter and video circuit
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37
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38 C. 15 dB detected RF amplifier
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39
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40 D. VCO power amplifier
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41
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42 E. RF leakage
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43
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44 If any section of the converter does not conforms to the verification
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45 procedure, the convertor assembly is defective and should be returned to the
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46 factory for exchange. If the module performs according to the checkout
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47 procedure, further troubleshooting is required in the basic counter. Please
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48 refer to the manual and to other sections in this binder or consult the factory
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49 for assistance.
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50
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51 =============== ======== ==============================
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52 Models Affected CCN Applicable Microwave Convertor
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53 =============== ======== ==============================
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54 535 /B all 2010241-01/03/05
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55 538 /B all 2010241-01/03/05
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56 545 all 2010137-01
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57 548 all 2010137-02/03
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58 545A 2201 2010137-01
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59 548A 2301 2010137-02/03
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60 545A /B 2202-... 2010241-01/03/05
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61 548A /B 2302-... 2010241-02/04/06
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62 575A all 2010241-01/03/05
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63 578A all 2010241-02/04/06
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64 =============== ======== ==============================
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65
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66 The difference between 2010137 and 2010241 convertors is the VCO board
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67 utilized. The difference makes the converter non-interchangeable.
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68
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69 The 2010137-03 is the direct replacement of the 2010137-02.
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70
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71 2010241-:
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72
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73 :01/02: IF frequency = 125MHz
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74
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75 :03/04: IF frequency = 127MHz
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76
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77 :05/06: IF frequency = 127MHz /no check of linearity
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78 linearity corrected by software (test 90)
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79 used in 2 MHz units
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80
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81 The following tests can be performed to verify the operation of the microwave
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82 convertor.
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83
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84
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85 VCO verification
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86 ----------------
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87
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88 1. Monitor A108 tp 14 (2020198 or 2020200) with DVM (for 2020138 use tp 4).
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89
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90 2. Monitor A109J2 with a spectrum analyzer. Set the center frequency to
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91 370MHz.
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92
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93 3. Program the VCO for 370MHz trough the keyboard::
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94
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95 press TEST 1 0
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96 press 9 8 2 2 1 8 (182218 -- 2 MHz unit)
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97 press 9 8 2 0 5 0 (182050 -- 2 MHz unit)
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98
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99 *The VCO frequency at A109J2 should be exactly 370 MHz.* Refer to the following
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100 table for the appropriate VCO tuning voltage.
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101
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102 ======== == ==================
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103 A108 P/N TP VCO tuning voltage
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104 ======== == ==================
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105 2020138 4 > -4.00 VDC
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106 2020198 14 > -4.00 VDC
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107 2020200 14 + 1.5VDC +/- .25 V
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108 ======== == ==================
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109
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110 4. program the VCO for 500 MHz trough the keyboard::
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111
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112 press 9 8 2 2 2 5 (182225 -- 2 MHz unit)
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113 press 9 8 2 0 0 0 (182000 -- 2 MHz unit)
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114
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115 *The VCO frequency at A109J2 should be exactly 500 MHz.* Refer to the
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116 following table for the appropriate VCO tuning voltage.
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117
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118 ======== == ==================
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119 A108 P/N TP VCO tuning voltage
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120 ======== == ==================
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121 2020138 4 > +9.5 VDC +/- .5V
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122 2020198 14 > +10 VDC +/- .5V
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123 2020200 14 + 10 VDC +/- .25 V
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124 ======== == ==================
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125
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126 5. select test 07 from the front panel::
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127
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128 press RESET
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129 press TEST 0 7
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130
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131 *The VCO should sweep from 370 MHz to 500 MHz in 50 kHz steps with no
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132 break-up. Any spur should be less than 60 dBc.*
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133
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134 YIG filter and video circuit verification @ 1GHz.
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135 -------------------------------------------------
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136
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137 In order for this test to work, the counter must placed in the test 10 mode
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138 and there should not be any signal applied to the Band 3 input prior to
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139 entering test 10.
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140
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141 1. Monitor terminal E5 of the convertor with the Y channel of an
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
142 oscilloscope trough a X1 proble.
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David Douard <david.douard@logilab.fr>
parents:
diff changeset
143
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David Douard <david.douard@logilab.fr>
parents:
diff changeset
144 2. Connect the horizontal output of a sweeper to the X input.
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David Douard <david.douard@logilab.fr>
parents:
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145
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
146 3. No input signal to the counter.
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David Douard <david.douard@logilab.fr>
parents:
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147
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David Douard <david.douard@logilab.fr>
parents:
diff changeset
148 4. Turn the counter off and back on again. Tune the YIG to 1 GHz trough the
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
149 keyboard::
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David Douard <david.douard@logilab.fr>
parents:
diff changeset
150
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David Douard <david.douard@logilab.fr>
parents:
diff changeset
151 press TEST 1 0
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David Douard <david.douard@logilab.fr>
parents:
diff changeset
152 press 9 8 4 2 0 1 (184201 -- 2 MHz unit)
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
153 press 9 8 4 0 RESET 4 (1840F4 -- 2 MHz unit)
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David Douard <david.douard@logilab.fr>
parents:
diff changeset
154
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
155 Input a -20dBm signal sweeping from 900 MHz to 1.1 GHz into the Band 3
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
156 input. Adjust the offset pot on A108 to center the bandpass of the YIG
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
157 filter on the display. Reduce the power to -20dBm. *The detected envelope
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
158 of the filter should be a minimum of 4mV in amplitude with a DC offset
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
159 less than +/- 50 mV.*
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
160
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
161 Offset adjustment reference designators
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
162
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
163 =================== ===========
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David Douard <david.douard@logilab.fr>
parents:
diff changeset
164 2020138 A108 R14
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David Douard <david.douard@logilab.fr>
parents:
diff changeset
165 2020198 A108 R13
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
166 2020200 A108 R10
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
167 2020200 (2MHz unit) use test 10
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
168 =================== ===========
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
169
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
170 2 MHz unit::
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
171
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
172 press TEST 10
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
173
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
174 a. press 1840XX
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David Douard <david.douard@logilab.fr>
parents:
diff changeset
175 b. every bit will change the center with 2 MHz
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
176 c. goto a. till adj. is done
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David Douard <david.douard@logilab.fr>
parents:
diff changeset
177
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David Douard <david.douard@logilab.fr>
parents:
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178 :note: data on 1842 most significant ! (value 1 bit = 510 MHz)
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David Douard <david.douard@logilab.fr>
parents:
diff changeset
179 data on 1840 least significant !
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David Douard <david.douard@logilab.fr>
parents:
diff changeset
180
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
181 15 dB detected RF amplifier on/off verification.
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
182 ------------------------------------------------
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
183
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
184 Change the input to 1 GHz, +5dBm. *The detected RF voltage at E5 should be
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
185 greater than +4VDC.*
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
186
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
187 Turn the amplifier off from the keyboard::
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David Douard <david.douard@logilab.fr>
parents:
diff changeset
188
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
189 press 9 9 0 1 3 DATA/CLEAR
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
190 1 9 0 1 3 DATA/CLEAR (2MHz unit)
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
191
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
192 *The voltage at E5 should decrease by a factor of 30.*
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
193
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
194 VCO power AMP on/off verification.
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
195 ----------------------------------
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
196
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
197 1. remove the input signal to the counter.
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
198
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
199 2. Turn the A203 power amp on trough the keyboard::
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
200
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
201 press TEST 1 0
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
202 press 9 8 4 3 3 RESET (1843F -- 2MHz unit)
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
203
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
204 *The voltage at E5 should be greater than 10VDC.*
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
205
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
206 3. Turn the power amp off trough the keyboard::
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
207
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
208 press 9 8 4 3 3 7 (184337 -- 2MHz unit)
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
209
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
210 *The voltage at E5 should be 0 VDC +/- 50mVDC.*
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
211
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
212 IF amp and IF treshold verification.
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
213 ------------------------------------
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
214
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
215 1. Program the YIG and VCO to count 1 GHz::
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
216
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
217 press 9 8 4 2 0 1 ; YIG at 1 GHz
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
218 press 9 8 4 0 RESET 4 ;
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
219 press 9 8 4 3 3 RESET ; power amp on
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
220 press 9 8 2 2 2 1 ;
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
221 press 9 8 2 0 8 7 ; VCO at 437.4 MHz
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
222
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
223 Input 1GHz at -28dBm to Band 3 input connector. Connect the spectrum
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
224 analyzer to the IF output port (J1) of the covertor.
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
225
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
226 *An IF signal should be displayed approximately 30 dB above the noise floor
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
227 at apprimately 125 MHz.* Adjust the input signal as necessary to peak this
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
228 signal.
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
229
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
230 Remove the analyzer and connect a power meter to the IF output port (J1)
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
231 of the convertor trough a 10 dB path. Monitor terminal E2 on the
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
232 convertor with a scope and *verify the voltage level to be a TTL low*.
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
233 Decrease the input power until the level toggles ta TTL high. *The input
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
234 power level should be between -28dBm and -40 dBm. The IF power should be
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
235 greater than -5 dBm when E2 toggles from TTL low to a TTL high. The IF
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
236 power should ne greater then -4 dBm when E2 toggles from a TTL high to a
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
237 TTL low as input power is increased.*
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
238
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
239 RF leakage test.
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
240 ----------------
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
241
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
242 1. Turn the ocunter off and back on again.
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
243
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
244 2. Program the YIG to below 500 MHz through the keyboard::
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
245
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
246 press TEST 1 0
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
247 press 9 8 4 2 0 0 (184200 -- 2MHz unit)
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
248 press 9 8 4 0 0 0 (184000 -- 2MHz unit)
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
249
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
250 Input a +7 dBm signal sweeping from 1 GHz to 18 (26.5) GHz. *The maximum
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
251 measured voltage at E5 should be .5 mV above the offset level noted in
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
252 paragraph B above from 1 GHz to 10 GHz and 1mV above the offset level
c838d0a9f9a9 [eip545b] part 5
David Douard <david.douard@logilab.fr>
parents:
diff changeset
253 from 10 GHz to 18 (26.5) GHz.*

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