MSG-2200 FM-AM SIGNAL GENERATOR
<Description>
The MSG-2200 is FM-AM Signal Generator (DDS method) especially developed and
designed to intend primarily for use in the FM-AM multi-band receivers in the
production lines. The carrier frequency range covers a frequency range of 100kHz
to 170MHz with AM/FM modulation capability, and the output level can be set in
the range of -20dBµ to 126dBµV.
Particular attention has been paid for ease in operation, functionality,
stability and economy. The MSG-2200 has a DDS AF oscillator that covers a
frequency range of 10Hz to 100kHz, and the frequency settling time is less than
2ms due to the DDS circuits.
With this one instrument, testing operations can be carried out most efficiently
and rapidly with application of a microprocessor in control of the many
functions.
<Features>
1. This instrument covers a frequency range of 100kHz to 170MHz, for AM and FM
signal suitable for testing multi-band receivers and also weather band.
2. The MSG-2200 has a DDS method to generate RF carrier frequency and also AF oscillator with a frequency range of 10Hz to 100kHz.
3. The frequency settling time is less than 2 ms due to the DDS circuits.
4. The RF output level covers a very wide range, -20dBµ to 126dBµV at open circuit and the attenuators are completely non-mechanical (electronic type) with no wear.
5. FM stereo modulator is built-in as standard.
6. A simultaneous AM/FM modulation function is equipped, and also delta (increment/decrement) control of frequencies and output level are possible.
7. All panel functions can be memorized and up to 100 points can be stored and
recalled.
8. Particular attention is paid for compactness and economy.
9. The GP-IB and external control I/O are provided as standard.
10. All operating functions are controlled with a microprocessor and the set values indicated in digital form for ease in the readout.
| < Specifications > |
| · Frequency (DDS method) |
| Range 100kHz ~ 170MHz |
| Indication 7-digit LED display |
| Resolution 100Hz step |
| Accuracy ±5×10-5 |
| Settling time Within 2ms at EXT-I/O recall |
| · Output |
| Range -20dBµ ~ 126dBµV (EMF) |
| Indication 4-digit LED display in dBµV / ( Combined with frequency display ) |
| Resolution 0.1dB step |
| Accuracy ±1.5dBµV (0 ~ 126dBµV) / ±2.0dBµV (-0.1 ~ -20dBµV) |
| Impedance 50 Ohm, VSWR less than 1.5 |
| Spurious <-20dBc at 120 ~ 130MHz / <-30dBc at other frequencies |
| · Modulation signal |
| Int. modulation (AF) signal (DDS method) |
| AF1: Frequency range 10Hz ~ 100kHz in 1Hz step, ±0.1% |
| AF2: Frequency range 100Hz ~ 900Hz in 100Hz step, ±0.1% / 1kHz ~ 32kHz in 1kHz step, ±0.1% |
| Ext. modulation input |
| FM input level 1Vp-p max. (18.3kHz deviation) / Impedance : 100k Ohm |
| AM input level 1Vp-p max. (DATA input section) / Impedance : 100k Ohm |
| · Frequency modulation (FM) |
| Deviation range 0 ~ 135kHz in 0.1kHz step |
|
Accuracy ±(Setting×0.1+0.5) kHz at 10.7MHz ±1MHz and 76 ~ 108MHz ±(Setting×0.1+1) kHz at 10.7 ~ 170MHz |
| Distortion <0.05% at 10.7MHz ±1MHz and 76 ~ 108MHz / <0.1% at 10.7 ~ 170MHz |
 With 1kHz signal at 75kHz
deviation in the demodulated band, 50Hz ~ 15kHz with 50µs
de-emphasis. |
| · Amplitude modulation (AM) |
| Modulation range 0 ~ 100% at <120dBµV in 0.5% step / 0 ~ 30% at >120dB V in 0.5% step |
|
Accuracy ±(Setting×0.1+1)% at RF frequency 0.4 ~ 1.7MHz ±(Setting×0.1+2)% at RF frequency 0.15 ~ 170MHz |
|
With AF 1kHz, <80%
modulation, RF output <120dBµ |
| Distortion At <100dBµV EMS of RF output level |
| RF frequency MHz | Modulation depth | ||
| 0 ~ 30% | 30.5 ~ 60% | 60.5 ~ 80% | |
| 0.4 ~ 1.7 | <1.0% | <1.5% | <2.0% |
| 0.15 ~ 110 | <1.0% | <2.0% | <3.0% |
| 110 ~ 170 | <1.5% | <3.0% | <5.0% |
| · FM Stereo signal section |
| Separation >46dB at 83MHz |
| Pilot |
| Frequency 19kHz ±2Hz |
| Level ratio setting range 0 ~ 15% in 0.1% step |
| Modulation mode MONO, MAIN, L only, R only, SUB, OFF |
| Modulation setting range 0 ~ 150% in 1% step |
|
Accuracy ±(Setting×0.1+1)% at 10.7MHz ±1MHz and 76 ~ 108MHz ±(Setting×0.1+1.5)% at 10.7 ~ 170MHz |
| Distortion <0.05% at 10.7MHz ±1MHz and 76 ~ 108MHz / <0.1% at 10.7 ~ 170MHz |
|
With AF 1kHz signal in
the demodulated band, 50Hz ~ 15kHz at modulation 100% with 50µs
de-emphasis |
| Pre-emphasis (Factory option) 25µs, 50µs, 75µs, OFF |
| · External modulation DATA input |
| Input level 1Vp-p max, (FM deviation should be 18.3kHz with 1Vp-p input) |
| Input impedance 100k Ohm |
| · External control interface |
| Preset memory 100 points of all panel functions |
| Interface GP-IB ( IEEE Std. 488.1-1987 ) / EXT- I/O, Fan-out 1 (LS-TTL level, DDK36P) |
| Dummy antenna switching 4.5V/0V (open), 50mA max. (RCA type) |
| · General data |
| Operating temperature 10ºC ~ 35ºC |
| Power supply AC100 ~ 240V, 50/60Hz |
| Dimension Approx. 300(W)×132(H)×360(D)mm |
| Weight Approx. 6kg |