User's Manual

M7X and M7R Page 2-3 Specification
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Reference Frequency Internal or external reference frequency sources can be selected. The
factory default is internal.
Internal The internal reference frequency is generated by a
10 MHz oscillator having a frequency accuracy better than
0.15 ppm and an adjustment range to allow for 20 years
ageing. An output is provided suitable for driving an
external frequency counter.
External For all waveforms, an external 10 MHz reference
frequency can be used instead of the internal reference
frequency.
Input Supplies
The M7X and M7R operate from either an ac mains or a dc input supply. When both supplies are
connected, operation from the ac supply takes priority; automatic change-over to the dc supply occurs if
the mains supply fails. On restoration of the ac supply, the equipment reverts to ac operation.
ac Supply Any voltage between 99 and 264 Vac, single phase, 48 to 62 Hz.
Power consumption figures are shown in Table 2-2.
dc Supply Any voltage between 21.6 and 32 Vdc, negative earth. Power
consumption figures are shown in Table 2-2.
Current Overload Separate ac and dc fuses mounted on the rear panel provide
protection from current overload.
Standby Standby removes power to all the radio circuits, but does not
disconnect the ac or dc input circuits from their relative supplies.
Table 2-2 M7X and M7R Power Consumption Figures
Model Switched On Standby Switched Off Switch On Inrush
ac dc ac dc ac dc ac dc
M7X
Transmit:
typically 550 VA.
825 VA maximum
Transmit:
typically 450 W.
700 W maximum
30 VA 100 mW 0 VA <5 mW
60 A
maximum
150 A
maximum
Receive:
typically 200 VA.
Receive:
typically 120 W.
M7R
Typically 100 VA.
220 VA maximum
Typically 70 W.
120 W maximum
30 VA 100 mW 0 VA <5 mW
60 A
maximum
150 A
maximum