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208143 REV C
Operations Manual, HPA3, Mini Compact Outdoor SSPA
2.2.1 RF In (J1) [Type N (F)]
The RF Input signal is applied to J1, which is a type N female connector. The Mini Compact
Outdoor SSPA has a default maximum nominal gain of 75 dB minimum. Therefore the
maximum input signal required to saturate the amplifier can be calculated as:
Input Power = P
sat
– 75 dB
For example, if a 50 W Ku-Band Mini Compact Outdoor amplifier is used in a system it has a
P
sat
= 47.0 dBm. Therefore the maximum input power should be limited to -28 dBm. Slightly
higher input power levels will not damage the amplifier but will result in higher levels of
distortion in the output signal.
WARNING! The maximum input level should be limited to +15 dBm to
avoid damaging the amplifier.
2.2.2 RF Out (J2)
The amplifier’s output is brought out through the waveguide port, J2. Caution should be
observed here to make sure that the antenna or a suitable termination is connected to this
port before operating the amplifier. The amplifier is protected against full reflection but
dangerous levels of microwave energy can be present at this port.
Ku-Band amplifiers have a WR-75 Grooved Flange while the C-Band and X-Band amplifiers
have CPR style grooved flanges (CPR-137G for C-Band; CPR-112G for X-Band). S-Band
amplifiers utilize a Type N (F) connector. An isolator is provided at the output flange with a
termination capable of handling full reflected output power.
WARNING! Never look directly into the RF output waveguide.
2.2.3 RF Output Sample Port (J3) [Type N (F)]
The RF Output Sample port, J3, is located on the bottom of the amplifier as shown in
Figure
2-1
. This connector provides a -40 dBc coupled sample of the amplifier’s output signal. It is a
type N female connector.
2.2.4 Port J4 Monitor & Control Connections
The M&C (Monitor and Control) connector is the primary input for controlling the amplifier and
monitoring fault conditions. It is a 32-pin circular connector, MS3112E18-32S. It requires a
mating connector, MS3116F18-32P, which is supplied with the unit.
Table 2-1
on the follow-
ing page shows the pin-outs of the J4 Monitor and Control Connector.
The Mini Compact Outdoor Amplifier has no on/off switch or circuit breaker in the AC Input
path. As soon as AC power is applied to J7, the unit’s power supplies and microcontroller are
enabled and the cooling fans should begin to spin.
However, the internal amplifier module
is disabled until the Mute Line Input (J4, Pin B) is pulled to Ground (J4, Pin V).
If it is
desired to have the RF enabled every time the AC input is applied, a permanent connection
can be made between J4, Pin B and J4, Pin V.