6.1.8.3
Helix Current?;
A command message requesting data, that results in a
response showing the helix current in mA. If a request is sent in any mode other than
transmit, the response will show zero helix current (see section 6.4.2 for details of
command and response format).
6.1.9
Elapsed Hours?
A command message requesting data, that results in a longer data string response
showing the total elapsed hours and the elapsed hours in the transmit, standby and
off modes (see section 6.4.4 for details of command and response format).
6.1.10 Operating Modes
The following simple command messages that do not have an associated return of
data allow control of the amplifier operating modes (see section 4.3 for details of
operating modes, see section 6.4.1 for details of message format).
6.1.10.1 Off;
Selects the off mode of operation.
6.1.10.2 Standby;
Selects the standby mode of operation. Results in the automatic
initiation of the cathode heater warm-up timer (180 seconds) if selected from the off
mode.
6.1.10.3 Transmit;
Selects the transmit mode of operation. Results in the
automatic initiation of the cathode heater warm-up timer (180 seconds) if selected
from the off mode.
6.1.11 Forward Power?
A command message requesting data, that results in a response showing the RF
output power in watts. If a request is sent in any mode other than transmit, the
response will show zero forward power (see section 6.4.2 for details of command and
response format).
6.1.12 Interface Set Up
To use the serial communications interface, the amplifier must be placed into the
remote mode of operation; this can only be done over the serial communications
interface. To send the remote enable command, the address and baud rate must be
correctly set. This can be done either:
i/
in hardware, on the 41-pin control connector using links (see section 5) or
ii/
via the master controlling device by polling all combinations of address and
baud. Once captured either the address or baud rate can be modified.
The following command messages allow the set-up and control of the serial
communications interface feature:
6.1.12.1 Set Address;
Allows the address to be set in nominal units between 48
and 111, 48 corresponding to address Hex: 30h, 111 corresponding to address Hex:
6Fh (see section 6.4.5 for details of passing parameters).
6.1.12.2 Set Baud Rate;
Allows the baud rate to be set in nominal units between 1
and 6, 1 corresponding to a baud rate of 600, 2 = 1200, 3 = 2400, 4 = 4800, 5 =
9600 and 6 = 19200 (see section 6.4.5 for details of passing parameters).
HBN63xx-1, Issue 8, Page 31
