X
X
L
L
D
D
C
C
M
M
A
A
N
N
.
.
d
d
o
o
c
c
3
3
-
-
5
5
8
8
R
R
E
E
V
V
E
E
To enter a 1 millisecond cable delay, send the following character string:
Sample entry: F51<SP>1000000NS<CR>
Response: OK<CR><LF>
Sample request: F51<CR> (using entry from above)
Response: F51<SP><SP><SP>+1000000ns<CR><LF>
3-252 SERIAL FUNCTION F52 - DISTRIBUTION CABLE DELAY ENTRY/REQUEST
Use Serial Function F52 to enter or request the distribution cable delay for compensating the timing
outputs for delays between the XL-DC and the point of use of the timing signals. Antenna cable delay
compensation should not be performed using this function. Use Function F51 for antenna cable delay.
The default is 0 ns. Typical delays for RG-58 = 1.4 ns/foot and RG-59 cables = 1.24 ns/foot. The value
is held in NVRAM. Positive delays entered here will advance the XL-DC timing outputs while negative
delays will retard them.
To determine the present value, send F52<CR> to the Serial Port. The port will respond with the ASCII
character string in the following format:
F52<SEP><SIGN><DELAY>ns<LT>
where:
F = ASCII character F (f or F for input string)
52 = the function number
<SEP> = one or more space characters.
<SIGN> = either + or -
<DELAY> = 1 to 9 digit delay from +001000000 ns to -001000000 ns
ns = nanoseconds (ns or NS for input string)
<LT> = line terminator, either a carriage return and line feed for output strings or
a carriage return only for input strings
<SP> = ASCII space character
Sample request: F52<CR>
Response: F52<SP><SP><SP><SP><SP><SP><SP><SP><SP>+0ns<CR><LF>
To enter a 1 millisecond cable delay, send the following character string:
Sample entry: F52<SP>1000000NS<CR>
Response: OK<CR><LF>
Sample request: F52<CR> (using entry from above)
Response: F52<SP><SP><SP>+1000000ns<CR><LF>
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