MSG-2270 FM-AM STANDARD SIGNAL GENERATOR
The MSG-2270 Series are
synthesized standard signal generators to design for generating signals in the
AM and FM broadcast frequency ranges, 100kHz to 110MHz respectively. Use of a
PLL system ensures high accuracy and stability in the carrier generation.
Frequency and amplitude modulation, singly or simultaneously, can be applied to
the RF carrier.
The RF output ranges from -20 to +99dBµV and can be set in 0.1dB steps. It
has been developed for rapid operation by using its memory functions controlled
with front panel keys and any frequency, modulation and output level
combinations can be stored at up to 100 points in the memory function.
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FEATURES >
1. All operation function are microprocessor-controlled and set values are
displayed in digital form.
2. It covers the frequency range, 100kHz to 110MHz, for AM and FM broadcast
frequency ranges and it is suitable
for testing multi-band receivers in the production line.
3. Carrier frequencies are locked with a crystal oscillator for high stability.
4. Frequencies are displayed in 6-digit form for accuracy in readout.
5. Output level range is -20 to +99dBµ with 2-digit readout.
6. The attenuators are completely non-mechanical with the use of semiconductors
for high speed switching action with no wear.
7. Back-up battery is provided to retain memory contents when the line power is
cut off.
8. The GP-IB interface bus ( comforting to IEEE ) is provided as standard,
enabling to connect a personal computor.
9. MSG-2270 series.
MSG-2270 FM-AM Standard Signal Generator
MSG-2271 FM-AM Standard Signal Generator with FM stereo unit
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| 1. Frequency characteristics | |
| Range | 100kHz ~ 110MHz |
| Indication | 6-digit LED display |
| Increment setting possible | |
| Resolution | Fo < 10MHz in 100Hz steps / Fo > 10MHz in 1kHz steps |
| Accuracy | ¡Ó 2¡Ñ10-5 ¡Ó1digit |
| ¡@ | ¡@ |
| 2. Output characteristics | |
| Range | -20dBµ ~ 99dBµ at open circuit |
| Indication | 2-digit LED display in dBµV |
| Accuracy | Vo > 0dBµ ¡Ó1.0dB / Vo < 0dBµ ¡Ó1.5dB |
| Frequency response | Fo < 400kHz ¡Ó1.5dB / Fo > 400kHz ¡Ó1.0dB |
| Output impedance | 50/75 Ohm switchable, VSWR : less than 1.2 |
| Spurious output | < -30dBc |
| FR leakage | Should not affect measurements with 0dBµ |
| Attenuator | Switching by the use of semiconductors and non-mechanical. |
| ¡@ | ¡@ |
| 3. Modulation characteristics | |
| 3.1 Modulation mode | AM modulation, FM modulation, and AM-FM simultaneous modulation |
|
3.2 FM data Deviation range |
Fo < 300kHz, Fo ¡Ñ10% 300kHz < Fo < 3MHz, 0.0 ~ 30kHz / Fo > 3MHz, 0 ~ 300kHz |
| Indication | 3-digit LED display |
| Resolution | Fo < 100kHz, 0.1kHz / Fo > 100kHz, 1kHz |
| Accuracy | ¡Ó5% at maximum value |
| Internal modulation | ¡@ |
| Frequency | 400Hz and 1kHz |
| Accuracy | ¡Ó3% for 400Hz and 1kHz |
| External modulation | ¡@ |
| Frequency range | 20Hz ~ 120kHz |
| Frequency response | ¡Ó1dB at 1kHz ref. |
| Input impedance | Approx. 10k Ohm, unbalanced |
| Input voltage | 2Vp-p ¡Ó2% |
|
Distortion ¡@ |
< 0.02% at Fo = 10.7MHz & Fo > 75MHz / < 0.1% at other frequency (With 1kHz signal 75kHz deviation in demodulated band, 250Hz ~ 20kHz with 50µS de-emphasis applied) |
| Residual FM | < 9.5Hz(78dB) in demodulated band, 80Hz ~ 20kHz with 50µS de-emphasis applied |
| Incidental AM | < 0.5% at 75kHz deviation |
| 3.3 AM data | ¡@ |
| Modulation range | 0.0 to 99.5% |
| Indication | 3-digit LED display |
| Resolution | 0.5% |
| Accuracy | ¡Ó5% at maximum value |
| Internal modulation | ¡@ |
| Frequency | 400Hz and 1kHz |
| Accuracy | ¡Ó3% for 400Hz and 1kHz |
| External modulating | ¡@ |
| Frequency range | 20Hz ~ 10kHz |
| Frequency response | ¡Ó1dB at 1kHz ref. |
| Input impedance | Approx. 10k Ohm, unbalanced |
| Input voltage | 2Vp-p ¡Ó2% |
|
Distortion ¡@ ¡@ |
< 0.2% at 50% modulation with 1kHz for 400 ~ 1700kHz < 0.5% at 400kHz > Fo < 30MHz / < 1.5% for other frequency (With 1kHz signal at 50% modulation in demodulated band, 50Hz ~ 10kHz) |
| Residual FM | < 0.1% (60dB) in the demodulated band, 80Hz ~ 20kHz |
|
Incidental AM ¡@ |
< 0.1% in demodulated band, 80Hz ~ 20kHz < 75Hz in demodulated b.and, 80Hz ~ 20kHz with 30% modulation |
| 4. GP-IB interface | Built-in as standard |
| 5. Presetting memory | 100-address memory presetting with one-touch recall |
| 6. General data | Operating temperature 5ºC~35ºC |
| Power requirements | 100, 115, 215V or 230VAC ¡Ó10%, 50/60Hz |
| Dimesions & Weight | Approx . 430(W)¡Ñ115(H)¡Ñ295(D)mm, 8kg |
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