PHASE CORRELATION METER
This meter is supplied complete with drive circuit card, and is designed to match conventional PPM displays. It indicates phase difference between left and right channels of a stereo signal, and is particularly helpful in giving immediate indication of an out-of-phase signal.
The scale background on this Mk.2 design is black with green, yellow and red regions marked on the scale to help the operator identify any increase in the phase difference between inputs. Mono or phase coherent signals to the inputs will result in the needle indicating in the green area to the right of the scale. The meter is designed for back-of-panel mounting, uses the same housing as the PPM 32AF, and is in a complementary style. Illumination by festoon lamp or white LED array is possible – see under ‘Sifam peak programme meters’ for details. The drive card has two balanced inputs, and mounts directly onto the studs on the rear of the meter. Connection is by Molex type connector (mating connector supplied), and power requirement is dual rail DC in the range ±12 to ±15 volts.
Technical Specification:
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Meter dimensions: | See Sifam peak programme meters 32AF drawing |
| Minimum input level: | –25dBm |
| Input impedance: | >47k ohms |
| Supply voltage: | ±12V to ±15V DC |
Manufactured by Sifam (meter) and Canford (drive card).