HP 8648 A/B/C/D - Changpuak.ch

Changing
Parameters While
Encoding (Option
1EP only)
Note
Note
Using the Buffer
The contents of the capcode and its related parameters such as
address can be changed via HP-IB without stopping encoding at all
while testing a pager.
The new contents affected by this change will be transmitted normally
from the third frame following the first frame since this HP-IB
command has been received. For getting the exact information of
the frame affected, it is recommended to monitor the Paging Status
Register Bit 0 (Start of frame). This indicates when the frame, to
which this HP-IB command is sent, starts.
--l-------I-------I ----- --
I_-
(HP-IB command)
New contents
I I
V I--> New contents affected
-----------------------------
I Frame I Frame I Frame I
I No. 1 I No. 2 I No. 3 I
Bit 0:
^ . ^ ^ ^
(Paging Status I
Register)
I I I I
The frequency value and amplitude value can be also changed via
HP-IB without stopping encoding, and these values will be changed
immediately after the HP-IB commands for these changes are sent,
The message should not be changed during the repeat frames when
testing a FLEX-TD pager.
(Option 1EP only)
Memory for the Using the buffer memory enables you to send the arbitrary messages
Arbitrary
Messages
(message 0) up to 128 frames for FLEX/FLEX-TD or 128 batches for
POCSAG. The buffer memory consists of the 128 segments numbered
from 0 to 127.
~~~--------_----_-__ . . . ---_____
Buffer Memory I 0 I 1 I 2 I I 127 I
Segment No.
I-----I ---__ I _____ I __
. . . --I-----
HP-IB Programming 2.41