AMETEK CTS
TWT Amplifiers
Quick Start and Safety Guide
V 1.0
9 / 10
3.
Quick Start
3.1
Rear Panel Connections
A. Remote interface panel
B. Mians power connector
C. Earth/Ground Terminal
D. Interlock
3.2 Front Panel Connection & Control
A. LCD Display
B. AC Mains on indicator
C. Standby (push button)
D. Operate (push button)
E. Air inlet cover and filter
F. FWD RF sample port
RFL RF sample port
G. RF output (coaxial or waveguide)
H. Modulator Input (BNC
I. Main’s switch
J. RF Input
3.3
RF on / RF Standby Operation
CAUTION:
Ensure mains voltage is present at the mains power connector.
3.4
Amplifier Power On
When the equipment is first switched on, especially if it has been in storage for a period time the initial operation
will need to be performed at low power. In addition, for pulsed units it’s recommended to start the unit with a
short (1 µs) pulse and slowly widen back to the desired operating pulse width, this will help to remove any gas
that may have built up in the TWT. To avoid TWT Arcs and damage caused by excessive gas build-up, it is ad-
visable to run the Amplifier for at least 24 hours every 6 months.
•
Connect power cord to a suitable power source. (
B
)
•
Engage the front panel circuit breaker. (
I
)
•
Display screen becomes illuminated. (
A
)
•
Amplifier is on in a “Standby” State. (
C
)
3.5
Applying an RF Signal
•
Set to “RF OFF” connect a suitable signal generator to the RF input (
J)
•
To start we recommend the power level is set to -25dBm.
•
For pulse TWT a 1µS pulse width.
•
Switch RF signal generator to “RF on”
3.6
Switching RF On / Standby
•
Pressing the “operate” button (
D)
on the front panel will switch the amplifier to an “RF On” state.
•
The power from the signal generator can now be turned up until the required output power from the am-
plifier is achieved.
•
Pressing the “standby” button will return the amplifier to the standby state.