comparison: content/hp3562a_2.rst
content/hp3562a_2.rst
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| 7 :Tags: HP3562A, repair, test equipment, DSA | 7 :Tags: HP3562A, repair, test equipment, DSA |
| 8 :series: HP 3562A | 8 :series: HP 3562A |
| 9 :series_index: 2 | 9 :series_index: 2 |
| 10 | 10 |
| 11 This is the part 2 of the series about my | 11 This is the part 2 of the series about my |
| 12 `HP 3562A Digital Signal Analyzer <{static}hp3562a.rst>`_, | 12 `HP 3562A Digital Signal Analyzer <{filename}/hp3562a.rst>`_, |
| 13 quickly describing the Digital Section of the instrument. | 13 quickly describing the Digital Section of the instrument. |
| 14 | 14 |
| 15 | 15 |
| 16 Digital Section | 16 Digital Section |
| 17 =============== | 17 =============== |
| 18 | 18 |
| 19 The unit is quite capable, since the main CPU is a 68000 (not exactly | 19 The unit is quite capable, since the main CPU is a 68000 (not exactly |
| 20 of small CPU for the time). | 20 of small CPU for the time). |
| 21 | 21 |
| 22 .. image:: {static}images/hp3562a/cpu.jpg | 22 .. image:: {static}/images/hp3562a/cpu.jpg |
| 23 | 23 |
| 24 The 8 boards are: | 24 The 8 boards are: |
| 25 | 25 |
| 26 - A1: Digital source and front-end interface (rev B, ref: 03562-66501) | 26 - A1: Digital source and front-end interface (rev B, ref: 03562-66501) |
| 27 - A2: CPU & GPIB controller (rev D, ref: 03562-66502) | 27 - A2: CPU & GPIB controller (rev D, ref: 03562-66502) |
| 28 - A3: Memory (rev B, ref: 03562-66538) | 28 - A3: Memory (rev B, ref: 03562-66538) |
| 29 - A4: Local oscillator (rev C, ref: 03562-66504) | 29 - A4: Local oscillator (rev C, ref: 03562-66504) |
| 30 - A5: Digital filter (rev B, ref: 03562-66505) | 30 - A5: Digital filter (rev B, ref: 03562-66505) |
| 31 - A6: Digital filter controller (rev D, ref: 03562-66506) | 31 - A6: Digital filter controller (rev D, ref: 03562-66506) |
| 42 | 42 |
| 43 .. Note:: The Service Manual available on the net lacks a few pages in | 43 .. Note:: The Service Manual available on the net lacks a few pages in |
| 44 the Digital Source section, so I do not have details on the | 44 the Digital Source section, so I do not have details on the |
| 45 Timing Control section. | 45 Timing Control section. |
| 46 | 46 |
| 47 .. image:: {static}images/hp3562a/hp3562a_a1_block_diagram.png | 47 .. image:: {static}/images/hp3562a/hp3562a_a1_block_diagram.png |
| 48 :alt: Block diagram of the A1 Digital Source Board | 48 :alt: Block diagram of the A1 Digital Source Board |
| 49 | 49 |
| 50 This board is mainly responsible for generating the digital signals | 50 This board is mainly responsible for generating the digital signals |
| 51 that are used as input for the source DAC. It generates all sort of | 51 that are used as input for the source DAC. It generates all sort of |
| 52 noise figures, bursts, sweeps, and so on. | 52 noise figures, bursts, sweeps, and so on. |
| 53 | 53 |
| 54 .. image:: {static}images/hp3562a/a1_digital_source.jpg | 54 .. image:: {static}/images/hp3562a/a1_digital_source.jpg |
| 55 | 55 |
| 56 The Timing Control section looks like: | 56 The Timing Control section looks like: |
| 57 | 57 |
| 58 .. image:: {static}images/hp3562a/hp3562a_a1_timing_control_circuit.png | 58 .. image:: {static}/images/hp3562a/hp3562a_a1_timing_control_circuit.png |
| 59 :alt: A1 Timing Control block diagram | 59 :alt: A1 Timing Control block diagram |
| 60 | 60 |
| 61 The Phase Resolution is used in external and internal triggered | 61 The Phase Resolution is used in external and internal triggered |
| 62 measurements, ensuring that the phase of a triggered measurement is | 62 measurements, ensuring that the phase of a triggered measurement is |
| 63 accurate. Since the trigger moment does not always occur on a sample | 63 accurate. Since the trigger moment does not always occur on a sample |
| 64 and hold edge, there is a time delay and phase error in the data. | 64 and hold edge, there is a time delay and phase error in the data. |
| 65 This phase resolution circuit counts the time between the samples and | 65 This phase resolution circuit counts the time between the samples and |
| 66 a trigger. | 66 a trigger. |
| 67 | 67 |
| 68 .. image:: {static}images/hp3562a/hp3562a_a1_phase_resolution_circuit.png | 68 .. image:: {static}/images/hp3562a/hp3562a_a1_phase_resolution_circuit.png |
| 69 :alt: A1 Phase Resolution block diagram | 69 :alt: A1 Phase Resolution block diagram |
| 70 | 70 |
| 71 The Burst Control circuit controls the burst length and generates the | 71 The Burst Control circuit controls the burst length and generates the |
| 72 pulse signal to the Local Oscillator (A4). It provides the gating | 72 pulse signal to the Local Oscillator (A4). It provides the gating |
| 73 signal that gates the analog source on and off during the burst and | 73 signal that gates the analog source on and off during the burst and |
| 74 chirp modes. | 74 chirp modes. |
| 75 | 75 |
| 76 .. image:: {static}images/hp3562a/hp3562a_a1_burst_control_circuit.png | 76 .. image:: {static}/images/hp3562a/hp3562a_a1_burst_control_circuit.png |
| 77 :alt: A1 Burst Control block diagram | 77 :alt: A1 Burst Control block diagram |
| 78 | 78 |
| 79 | 79 |
| 80 Other parts of this board are the LO Input Receiver that synchronizes | 80 Other parts of this board are the LO Input Receiver that synchronizes |
| 81 the local oscillator input data to the sample rate, the Multiplier | 81 the local oscillator input data to the sample rate, the Multiplier |
| 89 | 89 |
| 90 The processing unit is a MC68000. It aims at telling each assembly | 90 The processing unit is a MC68000. It aims at telling each assembly |
| 91 which process to execute and monitor the overall functionning and data | 91 which process to execute and monitor the overall functionning and data |
| 92 processing of the instrument. | 92 processing of the instrument. |
| 93 | 93 |
| 94 .. image:: {static}images/hp3562a/hp3562a_a2_block_diagram.png | 94 .. image:: {static}/images/hp3562a/hp3562a_a2_block_diagram.png |
| 95 | 95 |
| 96 The main CPU board, with the beautiful MC68000P9 DIP64 package: | 96 The main CPU board, with the beautiful MC68000P9 DIP64 package: |
| 97 | 97 |
| 98 .. image:: {static}images/hp3562a/a2_cpu.jpg | 98 .. image:: {static}/images/hp3562a/a2_cpu.jpg |
| 99 | 99 |
| 100 It comes with 2 populated M5M256BP static ram chips (32k x 8bits), for | 100 It comes with 2 populated M5M256BP static ram chips (32k x 8bits), for |
| 101 the CPU, but seems to be capable of holding 4 more of them. The CPU | 101 the CPU, but seems to be capable of holding 4 more of them. The CPU |
| 102 runs at 8MHz. | 102 runs at 8MHz. |
| 103 | 103 |
| 113 | 113 |
| 114 | 114 |
| 115 Memory | 115 Memory |
| 116 ------ | 116 ------ |
| 117 | 117 |
| 118 .. image:: {static}images/hp3562a/a38_memory.jpg | 118 .. image:: {static}/images/hp3562a/a38_memory.jpg |
| 119 | 119 |
| 120 This board is described as an "extension of the read only memory of | 120 This board is described as an "extension of the read only memory of |
| 121 the system CPU board" and read/write memory used by most of the other | 121 the system CPU board" and read/write memory used by most of the other |
| 122 assemblies. | 122 assemblies. |
| 123 | 123 |
| 124 .. image:: {static}images/hp3562a/hp3562a_a38_memory_block_diagram.png | 124 .. image:: {static}/images/hp3562a/hp3562a_a38_memory_block_diagram.png |
| 125 | 125 |
| 126 The ROM section stores most programs for the HP 3562A except the | 126 The ROM section stores most programs for the HP 3562A except the |
| 127 startup routines (which are on the ROM ships of the A2 CPU | 127 startup routines (which are on the ROM ships of the A2 CPU |
| 128 bloard). | 128 bloard). |
| 129 | 129 |
| 130 The board allows flexibility in the number and type of ROM chipes | 130 The board allows flexibility in the number and type of ROM chipes |
| 131 used. ROM density is selected by placement of jumpers. | 131 used. ROM density is selected by placement of jumpers. |
| 132 | 132 |
| 133 .. image:: {static}images/hp3562a/hp3562a_a38_rom_block_diagram.png | 133 .. image:: {static}/images/hp3562a/hp3562a_a38_rom_block_diagram.png |
| 134 | 134 |
| 135 | 135 |
| 136 The RAM section of the assembly consist of 4 32k by 8 bits static RAM | 136 The RAM section of the assembly consist of 4 32k by 8 bits static RAM |
| 137 chips as well as the arbitrer section which controls access requests | 137 chips as well as the arbitrer section which controls access requests |
| 138 to the global RAM from six devices (FFT, both Digital Filters, | 138 to the global RAM from six devices (FFT, both Digital Filters, |
| 139 Display, FPP and the system CPU). | 139 Display, FPP and the system CPU). |
| 140 | 140 |
| 141 .. image:: {static}images/hp3562a/hp3562a_a38_ram_block_diagram.png | 141 .. image:: {static}/images/hp3562a/hp3562a_a38_ram_block_diagram.png |
| 142 | 142 |
| 143 The Display Controller section also lies on this A38 board. | 143 The Display Controller section also lies on this A38 board. |
| 144 | 144 |
| 145 .. Note:: On older versions of the instruments, this board was | 145 .. Note:: On older versions of the instruments, this board was |
| 146 splitted in 2 (A3 and A8) and used less dense chips (thus, much more | 146 splitted in 2 (A3 and A8) and used less dense chips (thus, much more |
| 147 chips). | 147 chips). |
| 148 | 148 |
| 149 | 149 |
| 152 | 152 |
| 153 The Local Oscillator produces digital sin and cosine signals | 153 The Local Oscillator produces digital sin and cosine signals |
| 154 (synchronized with the sample rate). The sinusoidal signal is | 154 (synchronized with the sample rate). The sinusoidal signal is |
| 155 generated from a table of values stored in the ROM. | 155 generated from a table of values stored in the ROM. |
| 156 | 156 |
| 157 .. image:: {static}images/hp3562a/hp3562a_a4_block_diagram.png | 157 .. image:: {static}/images/hp3562a/hp3562a_a4_block_diagram.png |
| 158 | 158 |
| 159 .. image:: {static}images/hp3562a/a4_loc.jpg | 159 .. image:: {static}/images/hp3562a/a4_loc.jpg |
| 160 | 160 |
| 161 | 161 |
| 162 | 162 |
| 163 Digital Filter and Digital Filter Controller | 163 Digital Filter and Digital Filter Controller |
| 164 -------------------------------------------- | 164 -------------------------------------------- |
| 168 ans stores the results in global RAM. Processing consists of | 168 ans stores the results in global RAM. Processing consists of |
| 169 conversion from a serial format to a parallel format and, if required, | 169 conversion from a serial format to a parallel format and, if required, |
| 170 digital filtering or zoom (a combination of frequency shifting and | 170 digital filtering or zoom (a combination of frequency shifting and |
| 171 filtering). The processed data is transferred on the global data bus. | 171 filtering). The processed data is transferred on the global data bus. |
| 172 | 172 |
| 173 .. figure:: {static}images/hp3562a/a5_a6_block_diagram.png | 173 .. figure:: {static}/images/hp3562a/a5_a6_block_diagram.png |
| 174 :alt: Digital Filter Assembly block diagram | 174 :alt: Digital Filter Assembly block diagram |
| 175 | 175 |
| 176 Digital Filter Assembly block diagram. | 176 Digital Filter Assembly block diagram. |
| 177 | 177 |
| 178 **Digital Filter:** Each digital filter consists of a control IC and 2 | 178 **Digital Filter:** Each digital filter consists of a control IC and 2 |
| 179 filter ICs, one for the real data and one for the imaginary data. | 179 filter ICs, one for the real data and one for the imaginary data. |
| 180 | 180 |
| 181 .. figure:: {static}images/hp3562a/a6_zoom.png | 181 .. figure:: {static}/images/hp3562a/a6_zoom.png |
| 182 :alt: Digital Filter for the zoom mode | 182 :alt: Digital Filter for the zoom mode |
| 183 | 183 |
| 184 The Digital Filters are fed with a kind of LF I/Q demodulator, used | 184 The Digital Filters are fed with a kind of LF I/Q demodulator, used |
| 185 for zooming or actual digital filtering. | 185 for zooming or actual digital filtering. |
| 186 | 186 |
| 187 | 187 |
| 188 .. figure:: {static}images/hp3562a/a5_filter.jpg | 188 .. figure:: {static}/images/hp3562a/a5_filter.jpg |
| 189 :alt: Picture of the A5 Digital Filter board | 189 :alt: Picture of the A5 Digital Filter board |
| 190 | 190 |
| 191 Picture of the A5 Digital Filter board. | 191 Picture of the A5 Digital Filter board. |
| 192 | 192 |
| 193 .. figure:: {static}images/hp3562a/hp3562a_a5_block_diagram.png | 193 .. figure:: {static}/images/hp3562a/hp3562a_a5_block_diagram.png |
| 194 :alt: Digital Filter block diagram | 194 :alt: Digital Filter block diagram |
| 195 | 195 |
| 196 The A5 Digital Filter board block diagram. | 196 The A5 Digital Filter board block diagram. |
| 197 | 197 |
| 198 | 198 |
| 201 | 201 |
| 202 **Overload Detect:** The first 3 bits in the ADC serial data stream | 202 **Overload Detect:** The first 3 bits in the ADC serial data stream |
| 203 contain overrange information that must be stripped off the serial | 203 contain overrange information that must be stripped off the serial |
| 204 data. | 204 data. |
| 205 | 205 |
| 206 | 206 |
| 207 .. figure:: {static}images/hp3562a/a6_control.jpg | 207 .. figure:: {static}/images/hp3562a/a6_control.jpg |
| 208 :alt: Picture of the A6 Digital Filter Control board | 208 :alt: Picture of the A6 Digital Filter Control board |
| 209 | 209 |
| 210 Picture of the A6 Digital Filter Control board. | 210 Picture of the A6 Digital Filter Control board. |
| 211 | 211 |
| 212 .. figure:: {static}images/hp3562a/a6_block_diagram.png | 212 .. figure:: {static}/images/hp3562a/a6_block_diagram.png |
| 213 :alt: Digital Filter Controller block diagram | 213 :alt: Digital Filter Controller block diagram |
| 214 | 214 |
| 215 The A6 Digital Filter Controller board block diagram. | 215 The A6 Digital Filter Controller board block diagram. |
| 216 | 216 |
| 217 | 217 |
| 223 stored in the global RAM. The processing ALUs are six AM2903 bit-slice | 223 stored in the global RAM. The processing ALUs are six AM2903 bit-slice |
| 224 microprocessor ICs and one AM2910 microprogram | 224 microprocessor ICs and one AM2910 microprogram |
| 225 controller. Instructions are provided to the ALUs by an address | 225 controller. Instructions are provided to the ALUs by an address |
| 226 sequencer and seven microcode PROMs. | 226 sequencer and seven microcode PROMs. |
| 227 | 227 |
| 228 .. figure:: {static}images/hp3562a/hp3562a_a7_block_diagram.png | 228 .. figure:: {static}/images/hp3562a/hp3562a_a7_block_diagram.png |
| 229 :alt: Floating Point Processor block diagram | 229 :alt: Floating Point Processor block diagram |
| 230 :align: center | 230 :align: center |
| 231 | 231 |
| 232 Floating Point Processor block diagram. | 232 Floating Point Processor block diagram. |
| 233 | 233 |
| 234 .. figure:: {static}images/hp3562a/a7_fpp.jpg | 234 .. figure:: {static}/images/hp3562a/a7_fpp.jpg |
| 235 :alt: Picture of the A7 FPP board | 235 :alt: Picture of the A7 FPP board |
| 236 :align: center | 236 :align: center |
| 237 | 237 |
| 238 Picture of the A7 FPP board. | 238 Picture of the A7 FPP board. |
| 239 | 239 |
| 240 This Floating Point Processor is capable of handling 16 bits integers, | 240 This Floating Point Processor is capable of handling 16 bits integers, |
| 241 32 bits and 64 bits floats. | 241 32 bits and 64 bits floats. |
| 242 | 242 |
| 243 | 243 |
| 244 FFT | 244 FFT |
| 245 --- | 245 --- |
| 246 | 246 |
| 247 .. image:: {static}images/hp3562a/hp3562a_a9_block_diagram.png | 247 .. image:: {static}/images/hp3562a/hp3562a_a9_block_diagram.png |
| 248 | 248 |
| 249 The FFT board performs windowing, FFT and Inverse FFT directly from | 249 The FFT board performs windowing, FFT and Inverse FFT directly from |
| 250 and to the RAM. | 250 and to the RAM. |
| 251 It's built around a TMS230 microprocessor runningat 5MHz | 251 It's built around a TMS230 microprocessor runningat 5MHz |
| 252 | 252 |
| 253 .. image:: {static}images/hp3562a/a9_fft.jpg | 253 .. image:: {static}/images/hp3562a/a9_fft.jpg |
| 254 | 254 |
| 255 | 255 |
| 256 Keyboard | 256 Keyboard |
| 257 -------- | 257 -------- |
| 258 | 258 |
| 259 .. image:: {static}images/hp3562a/hp3562a_a15_block_diagram.png | 259 .. image:: {static}/images/hp3562a/hp3562a_a15_block_diagram.png |
| 260 | 260 |
| 261 | 261 |
| 262 Next | 262 Next |
| 263 ==== | 263 ==== |
| 264 | 264 |
| 265 In the `next part <{static}hp3562a_3.rst>`_, we will describe the | 265 In the `next part <{filename}/hp3562a_3.rst>`_, we will describe the |
| 266 Analog Section of the instrument. | 266 Analog Section of the instrument. |
