| Electronic Test Instruments
- Signal / Sweep Generator |
| S-990 AM/FM (Stereo) Synthesized Signal
Generator with built-in Sweep + Marker Generator |
|
| - |
Frequency Range
100KHz to 300MHz |
| - |
Sweep / Marker Generator
400KHz to 300MHz |
| - |
0.1dB resolution |
| |
1KHz Marker resolution |
| - |
Synthesized with Keypad Entry |
| - |
AM Modulation |
| |
0-99% in 1% steps |
| - |
FM Modulation |
| |
0-99KHz in 1KHz steps |
| - |
FM Stereo Modulation |
| |
Left/Right channel On/Off |
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| S-990
is a combination of FM(Stereo)/AM Synthesized Signal Generator and
a Sweep Marker Generator. It is a microprocessor based equipment using
synthesized techniques and covering the frequency range 100KHz to
300MHz in a single band.
The frequency selection is via keypad entry and the frequency
is displayed on 6 digit LED displays. The frequency can be increased/decreased
in 1KHz steps using the up/down keys.
The RF Signal is clean and the output is electronically levelled.
Sweep is available over the 400KHz to 300MHz range. Marker is
intensified pulse type, with a fine resolution of 1KHz.
S-990A is suitable for measurements on receivers, amplifiers,
antenna, filter networks, etc. The equipment is rugged and simple
to use. S-990A offers the unique advantage of aligning a receiver
and measuring its sensitivity, all in one equipment.
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|
Characteristics |
FREQUENCY
|
| Freq Range - |
100KHz to 300MHz in one band. |
| Sweep Range - |
400KHz to 300MHz in one band. |
| Display - |
6 digit LED display in MHz with a resolution
of 1KHz |
| Stability - |
1ppm/deg C from 0-40 deg C. Frequency synthesized |
| Frequency Selection - |
Keypad Entry with resolution of 1KHz to 250KHz
per step. |
| FM/AM/Sweep Selection -
|
Keypad Entry |
| |
|
| SPECTRAL PURITY |
|
| Harmonics - |
Less than - 30dBc |
| |
|
| OUTPUT |
|
| Range - |
200mV p-p |
| Impedance - |
50 ohms |
| Accuracy - |
+1dB from
10MHz to 100MHz and +2dB
above 100MHz and below 10MHz at 200mV output |
| Attenuation - |
100dB total attenuation. 4x20dB, 1x10dB accurate
to within +1dB/step. 10x1dB
accurate to within 0.25dB/step, upto 260MHz |
| Leakage - |
Less than 5uV induced in a 25mm loop at 25mm
away from surface of the instrument. |
| |
|
| AMPLITUDE MODULATION |
| Internal Source - |
1KHz +10%
sinewave |
| Output - |
1KHz 1V rms. |
| Depth - |
0 - 99% with 1% resolution |
| AM Mod Selection - |
Keypad Entry |
| Accuracy - |
+5% of
the reading +5% FSD or better upto 80%. |
| Distortion - |
Less than 5% at 30% depth or better |
| External Frequency Response - |
Flat within -3dB from 20Hz to 20KHz with
respect to 1KHz or better |
| |
|
| FREQUENCY MODULATION |
| FM (Mono) |
| Internal Mod - |
1KHz +10% |
| Peak Deviation - |
0-99KHz peak with 1KHz resolution |
| Accuracy - |
+ 3KHz |
| Distortion - |
+3% or
better |
| FM Mod Selection - |
|
| Ext Frequency Response - |
|
| FM (Stereo) |
|
| Internal Mod - |
1KHz +10%,
Left, Right Ch On/Off provided |
| Peak Deviation - |
75KHz peak |
| Pilot Signal |
|
| Freq Deviation - |
7.5KHz +1KHz |
| Frequency - |
19KHz +0.1% |
| Separation - |
30dB or more |
| |
|
| SWEEP |
| Sweep Width |
|
| + 300KHz max variable about centre freq for FM
Sweep applications |
| +20KHz max variable about centre freq for AM applications |
| Intensified
Marker - |
1 Marker at centre freq of sweep, to be connected
to the Z modulation input of the display unit. |
|
|
|
| GENERAL |
|
| Power - |
230V +10%, 50Hz |
| Accessories - |
Operating Manual, BNC-BNC Cable 50 ohms |
| Optional
at extra cost - IE-3105 XYZ Display Monitor |
|
| Remarks: All accuracies specified
at 25deg C ambient, 230V mains, 50Hz with eqpt grounded - after
warmup of 30 min. Specs, illustrations and price change privileges
reserved. |
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