Kenwood TK255 User manual

KENWOOD TRUNKED PORTABLE - Test Modes Ver 0.99 Page (1)
FYLDE
MICROSYSTEMS Ltd
Technical Manual
for
TK255/355 Test Modes
for version 0.99 Portable
software
Prepared by
Brian Seedle
BETA TEST

KENWOOD TRUNKED PORTABLE - Test Modes Ver 0.99 Page (2)
PORTABLE R.F ADJUSTMENTS - KENWOOD TK255/355
In order to provide technician service on the trunked portable, two Test Modes are provided.
This enables the mobile to be operated in a non trunked environment.
Note - It is essential that care be taken when keying up the transmitter. If the transmitter
were keyed on a local control channel, severe blocking may occur for live users on
the system.
VOL - Volume Control
ENCODER - Increment/Decrement menu selection
LED - Green - Synthesiser Locked
Red - Transmit
TEST MODE 1.
Test mode 1 is entered by powering up the mobile with the Programming Cable inserted in
the microphone/speaker socket and then DGT button held.
The display shows

KENWOOD TRUNKED PORTABLE - Test Modes Ver 0.99 Page (3)
The display will then change to the frequency setting menu at logical channel 0001. Note
that -
1. If the Rx synthesiser is locked the Green LED will illuminate
2. The mute is squelch controlled but if the RESET key is pressed, the mute will
be defeated and the MON icon will appear on the display. The RESET is a
toggle so a further press will again deactivate the squelch.
3. If the PTT is pressed -
If the Tx synthesiser is locked the Red LED will illuminate.
If the Tx synthesiser is unlocked the Read LED will flash
Note that this test must be done using a dummy load since the transmitter is
not inhibited if the Tx synthesiser is out of lock.
The actual frequency will be dependent on the band in use
TEST MODE 2
Test mode 2 is entered by powering up the mobile with the Programming Cable inserted in
the microphone/speaker socket and then DGT button held and the Reset key held..
The Squelch defeat operates in the same way as test mode 1.
The display shows
Removing the link will program the synthesiser to Test Channel 1.

KENWOOD TRUNKED PORTABLE - Test Modes Ver 0.99 Page (4)
In Test Mode 2. the engineer has access to 40 pre-set factory channels. These channels
are fixed. Not all channels are applicable to particular portable variant. e.g Only the VHF
high band channels are relevant to the high band variant. Some bands listed here may
never have a variant. The synthesiser locked LED will be useful, because it will indicate the
valid channels.
Channels applicable to VHF high band
Rx Ch 1
-
162.05
MHz
Tx Ch 1
-
162.00
MHz
Rx Ch 2
-
150.05
MHz
Tx Ch 2
-
150.00
MHz
Rx Ch 3
-
173.95
MHz
Tx Ch 3
-
173.9875
MHz
Rx Ch 4
-
162.1
MHz
Tx Ch 4
-
162.1
MHz
Rx Ch 5
-
162.25
MHz
Tx Ch 5
-
162.2
MHz
Rx Ch 6
-
150.15
MHz
Tx Ch 6
-
150.1
MHz
Rx Ch 7
-
173.85
MHz
Tx Ch 7
-
173.9
MHz
Rx Ch 8
-
161.9
MHz
Tx Ch 8
-
161.9
MHz
Channels applicable to the 223 MHz band
Rx Ch 9
-
229.00
MHz
Tx Ch 9
-
223.00
MHz
Rx Ch 10
-
MHz
Tx Ch 10
-
MHz
Channels applicable to Band III
Rx Ch 11
-
177.2125
MHz
Tx Ch 11
-
192.35
MHz
Rx Ch 12
-
183.4875
MHz
Tx Ch 12
-
185.2125
MHz
Rx Ch 13
-
201.2125
MHz
Tx Ch 13
-
199.4875
MHz
Rx Ch 14
-
207.4875
MHz
Tx Ch 14
-
191.4875
MHz
Rx Ch 15
-
183.5025
MHz
Tx Ch 15
-
183.5025
MHz
Rx Ch 16
-
177.3
MHz
Tx Ch 16
-
192.5
MHz
Rx Ch 17
-
183.4
MHz
Tx Ch 17
-
185.3
MHz
Rx Ch 18
-
201.3
MHz
Tx Ch 18
-
199.4
MHz
Rx Ch 19
-
207.4
MHz
Tx Ch 19
-
193.2125
MHz
Rx Ch 20
-
201.1
MHz
Tx Ch 20
-
201.1
MHz
Channels applicable to 450-470 MHz
Rx Ch 21
-
451.5
MHz
Tx Ch 21
-
454.25
MHz
Rx Ch 22
-
446.05
MHz
Tx Ch 22
-
446.0
MHz
Rx Ch 23
-
456.975
MHz
Tx Ch 23
-
462.475
MHz
Rx Ch 24
-
452.0
MHz
Tx Ch 24
-
452.0
MHz
Rx Ch 25
-
451.4
MHz
Tx Ch 25
-
454.2
MHz
Rx Ch 26
-
446.15
MHz
Tx Ch 26
-
446.1
MHz
Rx Ch 27
-
456.9
MHz
Tx Ch 27
-
462.4
MHz
Rx Ch 28
-
451.0
MHz
Tx Ch 28
-
451.0
MHz
Rx Ch 29
-
MHz
Tx Ch 29
-
MHz

KENWOOD TRUNKED PORTABLE - Test Modes Ver 0.99 Page (5)
Rx Ch 30
-
MHz
Tx Ch 30
-
MHz

KENWOOD TRUNKED PORTABLE - Test Modes Ver 0.99 Page (6)
Channels applicable to 420-450 MHz
Rx Ch 31
-
444.5
MHz
Tx Ch 31
-
432.0
MHz
Rx Ch 32
-
440.05
MHz
Tx Ch 32
-
425.0
MHz
Rx Ch 33
-
448.975
MHz
Tx Ch 33
-
431.99375
MHz
Rx Ch 34
-
440.2
MHz
Tx Ch 34
-
431.9
MHz
Rx Ch 35
-
431.9
MHz
Tx Ch 35
-
440.2
MHz
Rx Ch 36
-
444.6
MHz
Tx Ch 36
-
432.1
MHz
Rx Ch 37
-
440.1
MHz
Tx Ch 37
-
425.1
MHz
Rx Ch 38
-
448.9
MHz
Tx Ch 38
-
431.9
MHz
Rx Ch 39
-
440.15
MHz
Tx Ch 39
-
431.8
MHz
Rx Ch 40
-
431.8
MHz
Tx Ch 40
-
440.15
MHz
If the encoder is rotated clockwise, the logical channel will increment in steps of one and
conversely decrement for anti- clockwise rotation. To increase the steps, hold either the
DGT key or the ST key while rotating the encoder. The ST key makes the step size tens
and the DGT key hundreds.
If the 'F' key is pressed, the portable will cycle through the various test modes.
Mode 1. chnnnn - Channel Select
Mode 2. MIKE - Speech deviation adjustment
Mode 3. FFSK - FFSK deviation adjustment
Mode 4. DTMF - DTMF deviation adjustment
Mode 5. BEEP - Beeps and Rings volume level
Mode 6. LPWR - Low Power transmitter setting
Mode 7. HPWR - High Power transmitter setting
Mode 8. SL - Squelch Setting
Mode 9. L0 - L0/L2 Threshold
Mode A. BA - Battery Voltage Calibration
Note that if a setting is changed, the value will only be permanently saved WHEN THE 'F'
KEY IS PRESSED TO CHANGE MODE.
Mode 1. chnnnn - Channel Select
This is the mode in which Test Mode started. If the 'F' key is pressed past the end of
the tests, it will cycle back to this mode.
Mode 2. MIKE - Speech deviation adjustment
Connect the portable to a suitable R.F transmitter test set. Press the PTT to
transmit. While transmitting, the encoder will increase or decrease the
speech deviation. Note that the small digits on the left of the display will
show the encoder value.

KENWOOD TRUNKED PORTABLE - Test Modes Ver 0.99 Page (7)
Mode 3. FFSK - FFSK deviation adjustment
Connect the portable to a suitable R.F transmitter test set. Press the PTT to
transmit. While transmitting, the encoder will increase or decrease the FFSK
deviation. Note that the small digits on the left of the display will show the encoder
value. The default FFSK pattern is pre-amble (01010101010). The patter will
change to 1800 Hz (1111111111111) if the ST button is pressed or 1200 Hz
(0000000000000) if the DGT key is pressed. The recommended value is 1.5 kHz to
1.7 kHz.
Mode 4. DTMF - DTMF deviation adjustment
Connect the portable to a suitable R.F transmitter test set. Press the PTT to
transmit. While transmitting, the encoder will increase or decrease the DTMF
deviation. The DTMF generated is digit 0 (low tone 941Hz, High Tone 1336
Hz). Note that again the small digits on the left of the display will show the
encoder value.
Mode 5. BEEP - Beeps and Rings volume level
Turning the encoder will generate a beep with a volume level equal to that in
service. There are 14 different levels to choose.
Mode 6. LPWR - Low Power transmitter setting
Connect the portable to a suitable R.F transmitter test set. Press the PTT to
transmit. While transmitting, the encoder will increase or decrease the RF
transmitter power. As before the display shows the encoder value. During
trunked operation, the portable will try to use low power setting first
Mode 7. HPWR - High Power transmitter setting
Connect the portable to a suitable R.F transmitter test set. Press the PTT to
transmit. While transmitting, the encoder will increase or decrease the RF
transmitter power. As before the display shows the encoder value.
Mode 8. SL - Squelch Setting
The squelch circuit is an advanced digital design. A digital filter gives an average
noise power which is displayed in the two large right hand digits. The two large left
hand digits are the encoder setting.
Select a suitable channel in the area of the Network to which the portable will operate.
Inject an R.F carrier from a signal generator on the portable receive frequency for that
logical channel.
Set the level from the signal generator to the point at which the squelch will be
adjusted. Turn the encoder to a point whereby the squelch just opens.
If the squelch is open the green LED will illuminate.

KENWOOD TRUNKED PORTABLE - Test Modes Ver 0.99 Page (8)
Mode 9. L0 - L0/L2 Threshold
Set the signal generator to the point within the range -88dBm to -106dBm. Adjust
the encoder until the right most digit of the display just changes from 'L0' to 'L2'.
The actual values of squelch and L2 will depend upon the Network and the noise
floor within the coverage area. It may be necessary to get advice from the Network
Operator for recommended values.
Mode A. BA - Battery Voltage Calibration
Connect the Portable to a calibrated external power supply set to 7.50 volts. Turn
the encoder until the display reads 7-5.
Note concerning TEST MODE 1
It is possible to store data in the EEPROM during personalisation to calculate the transmit
and receive frequency. Note that if the portable has not been personalised, it will not be
able to calculate the channels from "base+logical number" since the base frequency is
entered during personalisation. The portable will therefore default to the fixed factory
channel table stored in the portable. If there is no factory channel table has been loaded
into the portable using the program KENENG then it will not be possible to use this test.