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The XE40 Exciter is an advanced, fully featured broadcast FM exciter that is also ideally suited for use as a low power stand alone transmitter which will operate into any load without damage thanks to its VSWR cut back circuit that protects the power amplifier stage from adverse operating conditions.

The XE40 front panel LCD metering allows selection of output forward and reverse power, frequency, heat sink temperature and any optional baseband input module settings. Selected screen also shows any relating fault or condition (‘Low’, ‘High’, ‘Muted’, ‘Interlock’, ‘Phase Lock Fail’, Fan Fail’ etc).

Also provided are: green/red pass/fail led indicators of system normal and CPU status plus a green/red/amber indicator of mute/interlock status. A front panel monitor point for RF output is provided. The rear panel includes a remote control/monitoring socket that allows carrier muting and status signalling to an external system. Additionally TCP/IP, (option /T) or RS232, (option /A) interfaces are available. Conservatively rated components are used to ensure extremely high reliability and to give good efficiency.

Variants of the XE40 are available with the choice of Universal AC, 12VDC, 24VDC, or 48VDC supply input. The XE40 comes as standard with a composite and SCA/RDS with a further comprehensive range available.


Frequency range 87.5 to 108MHz in 50kHz steps
Frequency stability < ± 200Hz
Power output 4W to 40W adjustable
Harmonic & spurious output < -75dBc (9kHz to 1GHz)
Spurious outputs < -85dBc (87.5MHz to 137MHz @ greater than 500kHz removed from carrier )
Synchronous Noise (AM due to FM) ≤ 0.3% @ ± 40kHz deviation ( excluding pilot) at a modulation frequency of 400Hz
Input sensitivity + 8dBu (adjustable) for ± 67.5kHz deviation: 5.5V peak to peak
MPX response < ± 0.2dB (5Hz – 15kHz)
AF THD (multiplex version) < 0.1% @ ± 67.5kHz deviation over 40Hz to 10kHz
Power supply (AC) 88- 264VAC, 47 – 63Hz
Power supply (DC) Options for nominal 12VDC, 24VDC and 48VDC.
Temperature (operating) -5°C to +50°C
Humidity (operating)  ≤ 95% RH, non condensing
Dimensions 1U with 500mm intrusion to rack (inc. connectors)