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MSG-2520 FM-AM Signal Generator
 (Production Discontinuance) Replacement : None |
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The 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.
Further, it is possible to mix the outputs and distribute them to four test positions. Two types of oscillator plug-ins cover the AM bands, 0.1 to 30MHz and three types for the FM band, 60 to 110MHz and TV sound frequency bands. They can be used in any combination to meet the set testing requirements. The carrier frequencies are initially set, stored in an RAM and controlled with an internal microcomputer. |
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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. |
| 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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Specifications are subject to change without notice. |
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