| The Model CMR is a state of the art instrument to unequalled accuracy and
stability, at a price comparable with analog monitors. With typical modulation, the CMR's
true ratio readout is a factor of 10 more stable than instruments that measure normalized
amplitude, an its phase readout is rock solid. Phase sign is automatic; no extra
operation. Practically, these features mean quick, accurate log or remote readings. The
CMR is fully remoteable via land or telemetry, using standard remote control equipment. An
optional repeater-controller is available for hardwire remote
control and readout via multiconductor cable at distances up to 1500 feet. The CMR's
outstanding performance and reasonable price make it ideal for new DA installations or for
modernizing the instrumentation of existing stations.
- True Ratio reading. Non-Reference and Reference
amplitudes are serparately measured and divided electronically to give an accurate digital
reading (and an equally accurate D.C. voltage for remote readings) that will not vary with
carrier level, and is exceptionally stable under conditions of deep, unsymmetric
modulation
- Stable, accurate phase reading with automatic phase
sign.
- Amplitude or True Ratio may be selected for
measurement with a front panel switch . Optional common point terminal for measuring
common point amplitude.
- Designed for Reliability and Maintainability. MIL
Spec. PC boards with plated through holes. Gold plated switch and relay contacts. Relays
have been tested to 10 to the seventh operations without failing. All ICs and relays are
socketed. Each unit is burned in at least one week to expose early IC failure.
- Dual Surge Protection. Gas Discharge tubes across
the sample line terminations, plus a relay that drops out when the monitor is not being
interrogated and disconnects the sample lines from the electronics, protect against
lighting induced sample line surges.
- LEVEL Meter simplifies installation.
- Accurate. Typically exceeds FCC specs. by
substantial margins.
- Narrow phase - sign ambiguity (typically, +0.1 degrees)
give accurate phase readings near zero or 180 degrees.
- One year warranty.
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