User's Manual

Digital ATSC Exciter-Modulator System Chapter 2,
Installation and Operating Instructions
Axcera Axciter, Rev. 0 9
MODULATOR TRAY UPCONVERTER TRAY LEVEL CONNECTOR
(J16) Post-Filter sample
input (Linear Distortion)
-10 to 0 dBm
(-5 dBm
Typical)
50Ω BNC
(J17) Pre-Filter sample
input
(Non-Linear Distortion)
-10 to 0 dBm
(-5 dBm
Typical but
within .5 dB
of J6 sample
level)
50Ω BNC
(J24) SW A output
(Normally jumpered to J4)
N/A
50Ω BNC
Table 2-4. Optional Connections to Axciter Modulator (Tray or Sled Based System)
MODULATOR NOTES
(J1) Ethernet input RJ-45 connector
(J3) RS-232 input DE-9 connector
(J5) RS-485 serial 2 data RJ-45 connector
(J6) 1 PPS external reference input
50Ω or 1kΩ BNC connection
selectable on screen
(J13 & J14) USB inputs USB connectors
(J8) RF SW 2 input RJ-12 connector
(J9) 10 MHz external reference input 50Ω BNC connection
(J23) SMPTE 310 input #2 75Ω BNC connection
(J33) Aural IF output 50Ω BNC connection
(J35) SMPTE 310 Serial #1 active output 75Ω BNC connection
(J32) SMPTE 310 Serial #2 active output 75Ω BNC connection
Power Supply Voltage
The power supply mounted in the Axciter modulator tray is capable of
operating using either 115 or 230 volts, by moving a switch, located below the
AC input jack located on the rear of the tray. The power supplies used in the
Axciter upconverter/downconverter tray, in the tray based system, is of a type
that requires no switching or jumper selection for operation from 115 or 320
volts. The power supply will operate correctly with any voltage from 85-264
volts AC, 47-440 Hz.
Note: There is an on/off circuit breaker located on the rear of the Axciter
modulator tray, the upconverter/downconverter tray and the driver/amplifier
chassis assembly, near the AC input plug. If the trays do not power up, check
that the on/off circuit breakers are on.
This completes the installation procedure for the Axciter tray-based and sled-
based systems.