5314028064

Belar SCM-1 SCA Frequency/Modulation Monitor

The SCM-1, added to the FMM-1 Monitor, provides complete monitoring and test functions for SCA storę-casting and remote telemetering applications. Up to four crystal switch positions allow four channels to be operated and tested. Interchangeable channel crystals permit unlimi-ted SCA frequency selection.

SIZE:    5-1/4" (13.3 cm) H;

19" (48.5 cm) W;

10-1/2" (26.7 cm) D.

WEIGHT:    14 Ibs (6.3 kg).

SCM-1    NPN    SCA Frequency/Modulation

Monitor

Belar RFA-1 FM RF Amplifier

This unit is a solid State FM rf amplifier for use in remote FM monitoring. It has 100 dB gain with a 70 dB dynamie rangę and 1 watt output. The 600 kHz phase linear bandwidth will not degrade a stereo multiplex transrr.ission. The zero axis limiters and good selectivity characteristics (50 dB down at 800 kHz) insure that adjacent cłiannel interferences are suppressed. Output impedance is 50 ohms.

AMM-1 AM Freęuency/Modulation Monitor Belar RFA-2 AM RF Amplifier

Companion to the AMM-1 Monitor, the RFA-2 allows remote monitoring of carrier frequency deviation and modulation characteristics. Built-in automatic gain control eliminates problems associated with changes in transmitter power level, antenna patterns, and signal fading. Automatic gain control provides a rangę of morę than 30 dB. The rf sensitivity is 100 pV across 50 ohms.

SIZE:    3-1/2" (8.9 cm) H;

19" (48.5 cm) W;

11-1/2" (29.2 cm) D.

WEIGKT:    8 Ibs (3.6 kg)

RFA-2    NPN    AM RF Amplifier

TFT 723 FM Frequency/Modulation Monitor

SIZE:

WEIGHT:

TFT 723 NPN

SIZE:    3" (7.6 cm) H; 19"

(48.5 cm) W; 11-7/8"

(30.2 cm) D.

WEIGHT:    7 Ibs (3.2 kg)

RFA-1    NPN    FM RF Amplifier

Belar AMM-1 AM Frequency/Modulation Monitor

The unique AMM-1 features a separate 100% negative peak indicators, detecting absence of carrier and independent of any calibration procedures. The normal peak indicator lamp may be set to 125%. The true peak reading modulation meter is switchable to read either positive or negative peaks. A built-in off-frequency alarm driver permits unattended measurement of frequency. The ±20 Hz frequency calibra-tor allows check of external equipment, such as automatic loggers.

The Model 723 receiver/monitor is designed for off-the-air monitoring of frequency and modulation parameters of FM transmitters. In addition ot a peak reading modulation meter, it has two peak flashers which measure and display plus and minus peak modulation simultaneously. Flashers are calibrated from 50% to 129%, in 1-percent inerements. The unit is usable as a six-digit precision frequency counter and has optional off-frequency alarm and optional BCD or analog automatic logging outputs. It ałso has stereo and SCA add-on capability.

7" (17.9 cm) H;

19" (48.4 cm) W;

16" (40.6 cm) D.

17 Ibs (7.7 kg)

FM Frequency/Modulation Monitor

SIZE:    5-1/4" (13.3 cm) H;

19" (48.5 cm) W; 10-1/2" (26.7 cm) D.

WEIGHT:    14 Ibs (6.3 kg)

AMM-1    NPN    AM Frequency/Modulation

Monitor    TFT 723 FM F reguency /Modulation Monitor

4-11