Changing the RF channel and/or the Baud rate
The RX4100 has a set-up switch block located on the back. Switch positions 1
through 5 set the RF channel, (ref Table1). Switch position 6 is for factory use
and should remain in the ON position for normal operation. Switch positions 7
and 8 select the baud rate.
Some notes:
Always remove the USB cable when changing any switch setting.
The default RF channel is 07 to match the remotes default. Changing the RF
channel requires that the remote transmitters used with the RX4100 “log on” to
the selected channel.
The default baud rate is 19.2K to match the software programs settings.
The white legend above the switch shows the default positions.
Changing the RF Channel
Table 1
shows the numeric value of the 31 selectable channels and the switch
setting. The switch setting of all
on
should not be used. In order for the students’
clickers to operate on the same RF channel as the RX4100, the selected RF
channel must be published, or otherwise be made known to the students in the
classroom where the
RX4100 is being used. A description of Student “log-in” for
the classroom RF channel is provided in the remotes instruction manual, and also
provided here:
To change the RF channel of the remotes:
1. Press and hold the down arrow key until the LED turns from GREEN to
RED (about 3 seconds).
2. Enter the 2 digit channel number (Valid channel numbers are 01 through
31), the LED blinks GREEN with each key press
3. Press the down arrow again. If a valid channel number is entered, after the
down arrow is pressed, the RED LED will slow blink until it either acquires
the RF receiver (in which case it will fast blink green) OR time out after
about 7 seconds then fast blink RED.
When you see the fast green blinks, you are logged in, and can use the remote in
that classroom. The remote will remember the last RF channel logged in until you
change it, or if the batteries are removed and replaced the remote will revert to the
default channel 07.
Changing the BAUD RATE
Table 2 shows the switch settings and resultant baud rate. The initial factory setting is 19.2K
baud which matches H-
ITT’s software, and is the recommended setting.
RX4100 Technical specifications
Length
3” (76mm) (excluding Antenna)
Width
4” (102mm) (excluding Antenna)
Height
1.4” (36mm) (excluding Antenna)
Weight
3.3 oz. (94 grams)
USB Port
USB-B connection
Baud rate
19.2K, 39.4K, 57.6K, 115.2K
DC power
USB, 100mA max.
RF carrier
2.4Ghz ISM band
RF channels
31
RF data
2Mbit, NRZ format
RF Range
300 feet open field**
FCC ID
UH9RX4100
** Indoor range may be significantly less, range is
specified under controlled open field testing with TX3100..
FCC ID: UH9RX4000
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT
TO THE FOLLOWING TWO CONDITIONS: (1) THIS DEVICE MAY NOT CAUSE HARMFUL
INTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED,
INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.
THE MANUFACTURER IS NOT RESPONSIBLE FOR ANY RADIO OR TV INTERFERENCE
CAUSED BY UNAUTHORIZED MODIFICATIONS TO THIS EQUIPMENT. SUCH
MODIFICATIONS COULD VOID THE USER’S AUTHORITY TO OPERATE THE
EQUIPMENT.
TABLE 2
Channel
# 1
# 2
# 3
# 4
# 5
1
OFF
ON
ON
ON
ON
2
ON
OFF
ON
ON
ON
3
OFF
OFF
ON
ON
ON
4
ON
ON
OFF
ON
ON
5
OFF
ON
OFF
ON
ON
6
ON
OFF
OFF
ON
ON
7
OFF
OFF
OFF
ON
ON
8
ON
ON
ON
OFF
ON
9
OFF
ON
ON
OFF
ON
10
ON
OFF
ON
OFF
ON
11
OFF
OFF
ON
OFF
ON
12
ON
ON
OFF
OFF
ON
13
OFF
ON
OFF
OFF
ON
14
ON
OFF
OFF
OFF
ON
15
OFF
OFF
OFF
OFF
ON
16
ON
ON
ON
ON
OFF
17
OFF
ON
ON
ON
OFF
18
ON
OFF
ON
ON
OFF
19
OFF
OFF
ON
ON
OFF
20
ON
ON
OFF
ON
OFF
21
OFF
ON
OFF
ON
OFF
22
ON
OFF
OFF
ON
OFF
23
OFF
OFF
OFF
ON
OFF
24
ON
ON
ON
OFF
OFF
25
OFF
ON
ON
OFF
OFF
26
ON
OFF
ON
OFF
OFF
27
OFF
OFF
ON
OFF
OFF
28
ON
ON
OFF
OFF
OFF
29
OFF
ON
OFF
OFF
OFF
30
ON
OFF
OFF
OFF
OFF
31
OFF
OFF
OFF
OFF
OFF
DIP SWITCH #
B A UD RA TE
# 7
# 8
19.2K
ON
ON
38.4K
OFF
ON
57.6K
ON
OFF
115.2K
OFF
OFF
DIP SWITCH #
TABLE 1
Switch settings shown are the factory default:
1,2,3 are off, and 4 through 8 are on
FIGURE 1
Switch 6 always ON
Note: the ON
or OFF position
is marked on
the switch
Switch positions 1 through
5 select the RF channel,
See table 1
Switch positions 7 and 8
select the baud rate,
See table 2
