H-ITT RFbase, model number 4000 instruction manual
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GENERAL:
The RFbase communicates with all H-ITT RF clickers. The H-ITT acquisition program, version 1.9.1 or higher
must be installed on your PC. There is no limit to the number of RF clickers (or RF links) that can be used with
a single RFbase. The RFbase has 62 RF channels that can be selected, and has 4 selectable baud rates. The
62 RF channels are provided so that a classroom can have its unique RF channel so as not to interfere with
adjacent classrooms, or other fixed frequency devices already installed in the classroom.
INITIAL SET-UP:
The unit provides both USB and Serial communications ports.
Connect either of these ports to your classroom PC (do not
connect both). The USB connection provides power to the
unit, so this is the only connection needed. If the serial port is
used, the unit must have an external power supply connected,
use H-ITT part number #2003.
On power up, the YELLOW indicator light will turn on and
both the PC com and RF com indicators will blink 4 times. If
the RF com indicator blinks more at a faster rate than the 4 initial blinks, this can indicate that the RF channel
selected may have another fixed frequency transmitter operating on the same channel within the range of the
base. If this occurs, it is recommended that a different channel be selected. Additionally, the RF channel
should be selected based on a cooperative effort with nearby classrooms so that each classroom within about
500 feet operates the H-ITT CRS on a unique RF channel selection.
CHANGING THE RF CHANNEL:
The RFbase snap on cover must be removed to access the RF channel selector switch. To remove the cover,
squeeze the bottom sides near the ends, and lift the top cover, it will un-snap. With the cover removed, Figure
1 shows the internal location of the 10position DIP switch used for set up. Switch
positions 1 through 6 set the RF channel.
Table 1 shows the numeric value of the 62
selectable channels. In general, the 6
switches represent a 6 bit binary number.
To decode this binary number, switch 1 is
the LSB and switch 6 is the MSB. When
the switch is ON the binary value is zero,
and when the switch is OFF the binary
value is one. The switch setting of 00 (all
on) and 11 (all off) should not be used.
In order for the student’s clickers to
operate on the same RF channel as the
RFbase, the selected RF channel must be
published, or otherwise be made known to
the students in the classroom where the H-ITT CRS is being used. A description of Student “log-in” for the
classroom RF channel is provided in the clickers users guide and also in appendix A herein.
Figure 1
Switch settings shown are the factory
default:
1. RF channel is 07
2. Baud rate is 19.2K
3. Clicker mode
Circuit board,
reference location
for the10 position
DIP switch
NTENNA
H-ITT RFbase
USB Port
Serial Port
DC power jack
1
2
3
4
5
6
7
8
9
10
Power indicator
Switch positions 1
through 6 select the
RF channel.
Switch 7 is reserved
Switch positions 8
and 9 select the
baud rate
Switch 10 sets the
operating mode
ntenna
RF com indicator
PC com indicator
TABLE 1, SWITCH SETTINGS and resulting CHANNEL NUMBER
SWITCH SETTING SWITCH SETTING
Channel #6 #5 #4 #3 #2 #1 Channel #6 #5 #4 #3 #2 #1
01 ON ON ON ON ON OFF 33 OFF ON ON ON ON OFF
02 ON ON ON ON OFF ON 34 OFF ON ON ON OFF ON
03 ON ON ON ON OFF OFF 35 OFF ON ON ON OFF OFF
04 ON ON ON OFF ON ON 36 OFF ON ON OFF ON ON
05 ON ON ON OFF ON OFF 37 OFF ON ON OFF ON OFF
06 ON ON ON OFF OFF ON 38 OFF ON ON OFF OFF ON
07 ON ON ON OFF OFF OFF 39 OFF ON ON OFF OFF OFF
08 ON ON OFF ON ON ON 40 OFF ON OFF ON ON ON
09 ON ON OFF ON ON OFF 41 OFF ON OFF ON ON OFF
10 ON ON OFF ON OFF ON 42 OFF ON OFF ON OFF ON
11 ON ON OFF ON OFF OFF 43 OFF ON OFF ON OFF OFF
12 ON ON OFF OFF ON ON 44 OFF ON OFF OFF ON ON
13 ON ON OFF OFF ON OFF 45 OFF ON OFF OFF ON OFF
14 ON ON OFF OFF OFF ON 46 OFF ON OFF OFF OFF ON
15 ON ON OFF OFF OFF OFF 47 OFF ON OFF OFF OFF OFF
16 ON OFF ON ON ON ON 48 OFF OFF ON ON ON ON
17 ON OFF ON ON ON OFF 49 OFF OFF ON ON ON OFF
18 ON OFF ON ON OFF ON 50 OFF OFF ON ON OFF ON
19 ON OFF ON ON OFF OFF 51 OFF OFF ON ON OFF OFF
20 ON OFF ON OFF ON ON 52 OFF OFF ON OFF ON ON
21 ON OFF ON OFF ON OFF 53 OFF OFF ON OFF ON OFF
22 ON OFF ON OFF OFF ON 54 OFF OFF ON OFF OFF ON
23 ON OFF ON OFF OFF OFF 55 OFF OFF ON OFF OFF OFF
24 ON OFF OFF ON ON ON 56 OFF OFF OFF ON ON ON
25 ON OFF OFF ON ON OFF 57 OFF OFF OFF ON ON OFF
26 ON OFF OFF ON OFF ON 58 OFF OFF OFF ON OFF ON
27 ON OFF OFF ON OFF OFF 59 OFF OFF OFF ON OFF OFF
28 ON OFF OFF OFF ON ON 60 OFF OFF OFF OFF ON ON
29 ON OFF OFF OFF ON OFF 61 OFF OFF OFF OFF ON OFF
30 ON OFF OFF OFF OFF ON 62 OFF OFF OFF OFF OFF ON
31 ON OFF OFF OFF OFF OFF
32 OFF ON ON ON ON ON
SETTING THE BAUD RATE:
The DIP switch positions 8 and 9 are used to set the baud rate of the RFbase. Reference figure 1 to locate the
DIP switch, and table 2 for setting the desired baud rate.
Table 2, SWITCH SETTINGS and resulting BAUD RATES.
DIP SWITCH
BAUD RATE 9 8
19.2K ON ON
38.4K ON OFF
57.6K OFF ON
115.2K OFF OFF
OPERATING MODE:
The RFbase has 2 operating modes:
1. Operating with H-ITT RF clickers.
2. Not used currently.
DIP switch position10 is used to select the desired mode:
ON is the RF clicker mode.
The RFbase is factory set for operation with the H-ITT RF clickers. All above instructions apply when used for
a H-ITT full RF based CRS.
MOUNTING THE RFBASE.
Before mounting the unit, connect the antenna to the screw on SMA connector on the end of the unit. The unit
can be simply set on a table top, or mounted to a wall using the “key-hole” on the back of the unit to hang it.
Position the antenna based on how the units is going to be mounted. Tests show the range is better when the
unit is wall mounted with the antenna pointing up.
For best performance:
1. The antenna should be vertical, or pointing up.
2. Avoid setting the unit on a metal table.
3. Mount the unit so it has a clear line-of-sight to the seats in the classroom.
APPENDIX A Logging in a H-ITT remote RF transmitter.
Students using their H-ITT RF clickers with the RFbase must log into the RF channel that is selected on the
base unit. Therefore, the channel number selected on the base must be published, or otherwise be known to
students logging in.
To log a remote in:
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; the LED blinks GREEN with each key press. (Valid channel numbers
are 01 through 62)
3. Press the down arrow again. If the channel was entered correctly, the LED will fast blink GREEN after a
few seconds. If the channel number entered was not the correct number, the LED will fast blink RED
after a few seconds.
NOTES: If an invalid number was entered, the LED will immediately fast blink red when the down arrow is
pressed. If a valid number is entered, after the down arrow is pressed, the RED LED will slow blink until it
either acquires the RFbase (in which case it will fast blink green) OR time out after about 7 seconds then fast
blink RED.
APPENDIX B Product Specifications
Length 7.07” (179.6mm)
Width 4.92” (125.0mm)
Height 1.40” (35.6mm)
Weight 9.3 oz. (263 grams)
USB Port USB-B
Serial Port DB9
Serial baud rate Selectable, 19.2K, 39.4K, 57.6K, 115.2K
DC Jack 2.1mm post DC jack, center positive
DC power USB power or 7 to 15VDC, 500mA.
RF carrier 2.4Ghz ISM band
RF channels 62
RF data 2Mbit, NRZ format
RF Range 200 feet typical with H-ITT RF clickers
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.
FCC ID: UH9RX4000
APPENDIX C Trouble shooting and FAQ’s.
We have found that most installation and start up problems can be solved by reviewing FAQ’s published at
http://www.h-itt.com
common basic problems and solutions for reference.
Q: I do not get any lights when I plug in the cable?
A: There are two sources of power for the unit. One is the USB connection. If you are using a USB cable, make
sure the connections to the PC and to the unit are secure, and the PC is turned on. If there is still no power up,
make sure the cable and USB port are OK by connecting a known good device with that cable to that port. If
the USB port and cable are verified good, then it may be a damaged unit and must be returned for service. If
you are using a serial cable, you must also have a power supply connected to the unit. The power supply (HITT part #2003) should be plugged into a known good standard 120V household outlet and firmly connected to
the the DC jack on the end of the unit. First, make sure the 120V outlet is operational by plugging in a lamp or
other standard AC appliance. Ocassionally the DC plug may have a film that could inhibit a good connection.
Twist the plug in the jack, and see if the lights turn on or flicker. If so, you can easily clean the plug with a
pencil eraser to remove any film on it. The unit should power up with DC power connected, even when the
serial port is not connected. The power supply can be tested if you have a voltmeter: the center should have 10
to 15 volts referenced to the outer metal plug part which is ground. If the power supply is not faulty, and the
unit still will not power up, it may be damaged and may require return for service.
Q: Students can not log in?
A: If a clicker is set to the correct channel, pressing any button (except the down button) on the clicker will
make the RF and PC indicators blink. If you get this blink, make sure that the H-ITT acquisition program,
version 1.9.1 or higher is installed on your PC and the baud rate selected in the program matches the baud
rate set on the unit. If you do not get the blink lights on the base when an RF clicker button is pressed, verify
the following 3 conditions are met:
1. Make sure the RF channel is set correctly to the channel number the students are logging on to.
2. The unit must be powered up (i.e. the yellow indicator is on)
3. The unit and clicker (with fresh batteries) are within range: 200 feet or less.
If you have not changed the RF channel it should still be set to 07, so try a RF clicker and log in on channel 07.
If you have changed the DIP switch settings, double check the published channel number, and make sure
switch 10 is in the ON position. If you still have problems the unit may be damaged and require return.
Q: Students can log in, they get the green blinking light, but the PC will not accept them.
A: When a clicker button is pressed (except for the down button) the unit’s RF and PC com lights should blink.
If these indicators blink, then the the problem is most likely with the PC connection, or software set up. If only
one of the com indicator lights blink, this may indicate a damaged unit, which may require service return. If
both com indicators blink, make sure H-ITT acquisition program version 1.9.1 or greater is installed in the PC,
all cable connections are secure and unit type and baud rate are selected correctly in the acquisition program.
Additional information regarding installation, applications and software can be found at http://www.h-itt.com
You can e-mail support@h-itt.com
product.
or contacting H-ITT technical assistance via e-mail at support@h-itt.com. Below are some
.
for technical assistance with any problems installing or using your H-ITT
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