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MSG-2520 is designed for use on the production line for AM-FM radios and TV sound receivers. It is a small-scale version of a "Centralized signal generating system" in which up to eight discrete test frequencies can be generated with oscillator plug-in units.
| FEATURES |
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AM and FM bands covered with five oscillator plug-in units (total of eight can be installed) in any combination. Data are given in the specifications. |
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Carrier frequency in each unit settable to six digits and memorized using a store switch. With an internal microcomputer, the frequency of each unit is controlled with a reference crystal oscillator. High accuracy and stability are assured. |
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The reference output level of each unit is 100dBµ and adjustable in the +1 to -6dB range. |
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Modulation applicable, internal or external, for 50% AM and 0 to 100kHz deviation for FM. |
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In addition to outputs from installed units, two external signals can be connected for additional mixed outputs. |
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Back-up battery included for storing memorized carrier frequencies at power off condition. |
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| SPECIFICATIONS |
| MAIN FRAME (MSG-2520) |
| Signal Generation |
Up to eight frequencies with AM and FM oscillator plug-in units |
| Frequency Display |
Max. 6 digits |
| Frequency Accuracy |
±2×10-5 |
| Frequency Resolution |
1kHz : 100kHz to 30MHz |
| 10kH z: 60MHz to 110MHz |
| 10kH z: TV sound frequency |
| Frequency Setting |
Each plug-in unit frequency can be set up or down at the selected digit order |
| Output Signals |
Four outputs, mixed with eight (max.) signals. 100dBµ |
| Source Impedance |
50Ω, VSWR < 1.2 |
| Spurious Signals |
< -40dB (at eight signal mixing) |
| External Signal Input |
| • Frequency Range |
Two signals in the 0.1 to 110MHz range and TV sound frequency bands |
| • Input Level |
100mVrms, max. |
| • Impedance |
50Ω, VSWR < 1.2 |
| Modulation |
| • Internal |
400Hz and 1000Hz ±5% |
| • External |
Input Impedance : approx. 10kΩ unbalanced
Input Voltage : 2Vrms at maximum indication
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| Power Requirements |
AC 100V, 115V, 215V or 230V ±10%, 50VA |
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| Dimensions |
Approx. 420 (W) × 165(H) × 450 (D)mm |
| Weight |
Approx. 12kg |
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| AM PLUG-IN UNITS (MU-25-1, MU-25-2) |
| Frequency Range |
| • MU-25-1 |
100Hz to 1700kHz |
| • MU-25-2 |
1.0Hz to 30MHz |
| Frequency Accuracy |
±2×10-5 |
| Frequency Resolution |
1kHz |
| Output Level |
100dBµ at 0dB indication; adjustable range, +1 to -6dB |
| Spurious Signals |
< -40dB (at eight signal mixing) |
| Residual FM |
> 66dB at 75kHz deviation (de-emphasis 50µs) |
| Residual AM |
> 50dB at 30% modulation |
| Modulation Range |
0 to 100kHz deviation, ±10% of full scale |
| Modulation Distortion |
In demodulated band, 20Hz to 20kHz; <0.05% at 75kHz deviation |
| External Modulation |
30kHz to 100kHz, response within ±1dB |
| Incidental FM |
< 200Hz at 30% modulation |
| Dimensions |
Approx. 47 (W) × 96 (H) × 265 (D) mm |
| Weight |
Approx. 700g |
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| FM PLUG-IN UNIT (MU-25-3, MU-25-4, MU-25-5, MU-25-7) |
| Frequency Range |
| • MU-25-3 |
60 to 76MHz |
| • MU-25-4 |
75 to 91MHz |
| • MU-25-5 |
87 to 110MHz |
| • MU-25-7 |
TV sound frequency bands |
| Frequency Accuracy |
±2×10 -5 |
| Frequency Resolution |
10kHz |
| Output Level |
100dBµ at 0dB indication; adjustable range, +1 to -6dB |
| Spurious Signal |
< -40dB (at eight signal mixing) |
| Residual FM |
> 76dB at 75kHz deviation (de-emphasis at 50µs) |
| Residual AM |
< 0.1% |
| Modulation Range |
0 to 100kHz deviation, ±10% of full scale |
| Modulation Distortion |
In demodulated band, 20Hz to 20kHz; <0.05% at 75kHz deviation |
| External Modulation |
30kHz to 100kHz, response within ±1dB |
| Incidental FM |
0.5% at 22.5kHz deviation |
| Dimensions |
Approx. 47 (W) × 96 (H) × 265 (D) mm |
| Weight |
Approx. 700g |
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