Note
Ham Radio, Oct 1974, p. 66.
The Ascom ASMR100 transmitter/antenna system tester is a three-way test instrument which provides a constant monitor of transmit/antenna functions in any VHF system.
When installed in the transmission line between the antenna and transceiver, it provides an accurate check of power output with settings of 25 or 50 watts full scale.
Accuracy is ±5%. The second inline function of the instrument measures the standing wave ratio of the antenna circuit to assure optimum efficiency. The instrument can also be used as a field-strength indicator.
Frequency range is 144 to 174 MHz.