Waveform Packet - Escort Prism 20401 Reference Manual

HR HIGH LIMIT is 1 byte long and represents heart rate HIGH alarm limit (not currently
supported at this time).
HR LOW LIMIT is 1 byte long and represents heart rate LOW alarm limit (not currently
supported at this time).
REMOTE STATUS is 1 byte long (see Table 5 for Remote Status).
REMOTE RECORD is 1 byte long.
BACKPORT WAVEFORM is 1 byte long. The Backport Waveform byte is divided into
three fields, Port 1, Port 2, and Port 3. The value of each field is defined in Table 6.
Sample Parameter Packet
Packet ID P0 P1
2 bytes 3 bytes 3 bytes
1b 50 42 00 46 12 00 46
P8
3 bytes
7a 00 46
HR High
Limit
1 byte

Waveform Packet

The waveform packet is identified by its 2 byte ID <ESC> <W>, followed by a 1 byte
<Waveform No.>, followed by a length byte. Table 2 shows the waveform packet format sent by
the CIS module.
2 bytes 1 byte 1 byte
Packet Waveform
Length
ID Number
The above segments are as follows:
The ID field consists of <ESC> <W> and is 2 bytes long. [1Bh] [57h]
The Waveform Number field consists of <Waveform No.> and is 2 bytes long. Refer to
Table 3 for waveform numbers of each parameter.
The Length field is 1 byte long. The length byte represents the number of bytes that include
waveform data. Waveform resolution is limited to 00h – FEh (254 decimal). FFh (255d) sets
a pacer flag, which may be used for pacer detection when PACER ON is selected.
Transmitted waveform information varies depending on monitor's configuration. Please note
the voltages and Hz information in Table 2.
P2 P3
3 bytes 3 bytes
75 00 46 4d 00 46
P9 P10
3 bytes 3 bytes
52 00 46 63 00 46
HR Low Remote
Limit Status
1 byte 1 byte
00 00 00
Table 2. Waveform Packet
Approximately 160ms of Waveform Data sent at a
sample rate of 120Hz for 110V/60Hz monitors.
Approximately 200ms of Waveform Data sent at a
sample rate of 100Hz for 220V/50Hz monitors.
9-20
P4 P5 P6
3 bytes 3 bytes 3 bytes
57 00 46 1b 00 46 08 00 46
P11 P12 P13
3 bytes 3 bytes 3 bytes
5e 00 46 72 01 46 00 00 56
Remote Backport
Record Waveform
1 byte 1 byte
00 40
<Length>
—OR—
P7
3 bytes
11 00 46
P14
3 bytes
22 00 46
Check
Sum
1 byte
2d
1 byte
CHECK SUM