ZETRON 15P, Operating Manual

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Section 7. Quick Reference
7-7
HSC TONE FREQUENCIES AND TIMINGS
Table 7. QUICK REFERENCE-8 HSC Tones and Timings
HSC EIA
(USA)
CCIR ZVEI EEA
0 600 1981 2400 1981
1 741 1124 1060 1124
2 882 1197 1160 1197
3 1023 1275 1270 1275
4 1164 1358 1400 1358
5 1305 1446 1530 1446
6 1446 1540 1670 1540
7 1587 1640 1830 1640
8 1728 1747 2000 1747
9 1869 1860 2200 1860
A 2151 2400 2800 1055
B 2435 930 810 930
C 2010 2247 970 2247
D 2295 991 886 991
E 459 2110 2600 2110
F none none none none
Timing
Gap 64 290 140 100
Tone 33 100 70 40
Note: All tone frequencies are in hertz and all tone timings are in milliseconds.
HSC Format
HSC (hexadecimal sequential code) pagers are capable of many functions, all of which are
implemented in the Model 15. When sending a page, the function is specified by one or two
function digits that are entered after the capcode. HSC pagers use a unique battery saving
method, in which the encoder issues tone sequences to command the pager to power down its
RF circuitry or “go to sleep” for a specified period of time, typically 10-30 seconds. The
encoder keeps track of when it has last sent the “go to sleep” command and waits until the
pager “wakes up” before sending the page. If no pages are being sent, the encoder will
methodically key the transmitter and issues the “go to sleep” command as soon as the pager
“wakes up”. This periodic keying of the transmitter and sending tones will continue as long
as the encoder is idle. See “HSC Format” in Section 5 for how to disable battery saver,
which will leave the pagers powered on continually. Both unsquelching and resetting the
audio muting of the HSC pager are controlled by tone sequences from the encoder. For any
function/message that requests Talk, the interval will be given following transmission of the
HSC address and message tones. Speak when “tALH” is displayed. A pager Mute will
automatically follow the Talk interval; “PAGE” will again be displayed.
If any message function is repaged, a new message must be entered before paging. The old
message is lost.
No HSC pager numbers may be entered into the memory stack.