Spacelabs Healthcare Ultraview 90341, Service Manual

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Patient-Worn Transmitter Configuration
(90341, 90343, 90347)
Each patient-worn transmitter’s RF PCBA contains two banks of
single inline package (SIP) switches (SW1 and SW2) that define the
channel used by the transmitter. These switches set up a binary
code that is transmitted to the receiver along with patient
information. Twelve bits on SW1 and SW2 define the transmitter
channel ID number and the remaining four bits define the
transmitter type (90341, 90343, or 90347).
The channel ID number is decoded by the receiver and is used to
confirm that data from the intended transmitter is being received.
SW1 and SW2 are set at the factory and normally do not require
changing in the field.
Note:
This information on transmitter switch settings is provided to
allow a qualified technician to correctly reset them should they
be changed. You cannot change transmitter frequencies without
also realigning the transmitter’s tuned circuits.
These switches may be set by changing individual switch positions
with a small screwdriver. Switch polarity and position numbers are
indicated on the switch. A
1 corresponds to the switch being ON,
and a 0 corresponds to OFF.
Note:
The correct crystal frequency for the selected channel must be
installed. Part numbers for ordering the required crystal are
provided in
Table 2-11 on page 2-50 and Table 2-12 on page 2-56.
Figure 2-13 displays an example of the switch settings for channel
2242 on a 90347-05 transmitter (top) and a 90343-05 transmitter
(bottom). (Refer to
Table 2-11 on page 2-50 for details.)
Figure 2-13 Example of switch settings for 90347-05 and 90343-05
SW1
8 7
6 5 4 3 2
1
8 7 6 5 4 3 2 1
transmitter type
(90347-05)
channel ID
(2242)
OFF
ON “I”
“O”
SW2
8 7
transmitter type
(90343-05)
SW2
channel ID
(2242)
6 5
(same as 90347-05 above)
OFF
ON “i”
“O”