CSI CS108G+ Operating Manual

HF TRANSCEIVER

Connect Systems Inc.

5321 Derry Avenue Suite B,

Agoura Hills, California 91301 U.S.A.

www.connectsystems.com [phone]

CS108G+

Outdoor version Operating Manual

1

Important reminder:

Before operating the equipment, please read

our operating manual carefully and keep the

Security considerations:

Do not use equipment during a lightning storm.

Protect against moisture!

Do not operate illegally!

Caution! There is high-voltage RF on

Features:

 Lownoise, single conversion HF

transceiver.Double balanced diode mixer for

extended dynamic range.

 0.25μV receive sensitivity (preamp on).
 Narrow band double tuned band-pass filters

covering all HF amateur frequencies including

WARC bands.

 Built NC APC circuit.
 Circuit standard with high quality 0.5ppm

TCXO clock source.

 500 Hz narrow band CW filter configuration.

2

一、Specification’s

Packing list:

Quantity

① CS108G+.................. 1

② Power supply cable........ 1

③ Hand microphone........... 1

①

②

④ ③ ⑤

3

Basic specifications

I．Specification:

General Specifications

Frequency range: Receive:0.5~30MHz（Continuous）

Transmitting: All HF Amateur bands including WARC bands

Operating mode: SSB （J3E）

CW （A1A）

AM （A3E）

Minimum frequency step: 10Hz

Antenna impedance: 50Ω

Maximum operating temperature: 55℃(131º F)

Frequency stability: ±0.5ppm @ 5 minutes after applying power

Operating voltage: 12~14.5V DC

Current draw: Receiving: 600mA @Max

Transmitting: 7.5A @ Max

Dimensions (mm): 120*45*180（mm） [Does not include the front and rear handles or knobs.]

Transmitter

Transmitter power：More than 15W（@13.8V）

Modulation mode: SSB balanced modulation:

AM Low level modulation

Spurious response rejection: ≥40dBc

Carrier suppression：≥45dBc

IF filter：SSB 2.4kHz(-6dB)

CW 500Hz(-6dB)

4

Receiving

IF Frequency: 10.7MHz

receive sensitivity: 0.5uV @ 12dB SINAD (PRE ON，≤2.0MHz）

0.35uV @ 12dB SINAD (PRE ON，＞2.0MHz）

Receive Frequency bands:

1.8~2.0MHz

3.5~4.0MHz

5.0~5.5MHz

7.0~7.3MHz

10.0~10.2MHz

14.0~14.5MHz

18.0~18.2MHz

21.0~21.6MHz

24.8~25.0MHz

28.0~28.8MHz

Dynamic range :Better than 90db

RIT (Receiver Incremental Tuning) Frequency control range: ±1kHz

audio output: 0.5W@8Ω

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II. Description of equipment

2.1 Front Panel Description

1. Metal handle

2. Power switch/Volume knob

3. Color OLED display screen

4. Microphone port

5. UP Key

6. Multi-function Key

7. Main function knob(frequency knob)

8. DOWN Key

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2.2 Rear Panel Description

1. Back metal handle

2. Antenna interface

3. AUX port

4. External speaker output

5. KEY port

6. ACC port

7. USB port

8. DC power input

9. Ground connection.

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2.3 Microphone

1. Lock button/Press it again unlock

2. PTT button:Launch control button

3. Up / Down: In the system settings menu, upper and lower entry selection

4. Receiving indicator

5. Multi-function

6. Filter selection buttons：Selection of built-in filter

7. Mode selection button：Selection of working mode of the host

8. No indication

9. F1/F2 Custom set key

10. Memory write button

11. Frequency/Channel switching button

12. VFO-A / VFO-B switching button

13. No function

8

2.4 Display information description

1. Pre-attenuator/Preamplifier/Voice compression

2. Receiving / transmitting status

3. Current operating frequency value

4. Current functional status: SPLIT, NB Suppressor, AGC, Key mode

5. Received signal strength indicator

6. Real time power/SWR indicators

7. The current input voltage display

8. Time display

9. Current working mode/Filter bandwidth

10. Multi-function key

11. Lock indication

12. Parameter setting

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III．Operating instructions

To go between different screens, press the Main Function Knob.

3.1 Screen display instructions

【TS+】Increase frequency step

This moves the frequency marker from right to left. When it gets to the far left it wraps around to
the lowest digit. When you turn the frequency knob clockwise, you increase the frequency based on
the frequency step you are under. When you turn the frequency knob counter clockwise, you
decrease the frequency based on the frequency step you are under.

【TS-】Reduce frequency step

This moves the frequency marker from left to right. When it gets to the far right it wraps around to
the highest digit. When you turn the frequency knob clockwise, you increase the frequency based
on the frequency step you are under. When you turn the frequency knob counter clockwise, you
decrease the frequency based on the frequency step you are under.

【ATT】Switch receive signal attenuator on or off

When the attenuator is on, the signal is attenuated about 10 dBm. You would typically keep the
attenuator on when you are trying to listen to a very strong signal or there are strong signals around
the frequency you are listening to. Keep the attenuator off if you are trying to listen to very weak
signals. When the attenuator is on, there is a small ATT indication on the top left of the screen.

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【PRE】Switch receive preamp on or off

When the Preamp is on, the sensitivity is increased about 10 dBm. You would typically keep the
preamp on when you want to listen to very weak signals. The preamp increases the background
noise as well as the weak signals. When the preamp is on, there is a small PRE indication near the
top left of the screen

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【MODE】Select desired operating mode – CW/AM/LSB/USB.

Select CW for Morse Code, AM for amplitude modulation, LSB for lower side band when using
single sideband modulation, and USB for upper sideband when using single sideband modulation.
The modulation choice is shown on the second line about the middle of the screen.

【AGC】Select AGC (Automatic Gain Control) level-FAST/SLOW/OFF

Use automatic gain control when you want to have the audio output at a constant level even when
the people speaking vary how loud or soft they are speaking. It is recommended to keep this feature
off when you have a very weak signal. The choice of fast or slow is dependent on the noise and type
of signal you are listening to. When the AGC is set to OFF, the S meter is disabled. The AGC choice is
shown below the frequency readout in the middle of the screen.

【NB】Select NB (Noise Blanker) level between 1 and 4 and OFF

This feature is used to minimize hearing ignition type of noise. The NB indication is shown below the
frequency and to the left of the AGC indication.

【A/B】Switch between VFO A & VFO B.

This feature allows you to quickly toggle between two discrete frequencies. It is very useful if you want to monitor

two separate conversions or possible monitor both the input and output frequencies of a repeater. The VFO

indication is shown on the second line of the display towards the left.

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【A=B】Set VFO A the same as VFO B.

You would keep VFO A and VFO B the same when you want to transmit and receive on the same
frequency. This minimizes the spectrum usage and is a good practice when speaking to one other
person but is not always the optimum way of doing things.

【SPLT】Select SPLIT operating mode on or off.

Split allows you to separate your transmit frequency from your receive frequency. This is a good
strategy where there is a "pileup" or there are many people trying to reach you at the same time.
When multiple people try to reach you at the same time and you try to answer on the same frequency,
you will probably have collisions. By separating the transmit and receive paths, while you are
transmitting, you will not be interfering with other people and you will be able to hear all the traffic
directed at you.

【RIT】Select RIT (receiver incremental tuning) mode-adjust

This feature allows you to move the receiver frequency slightly offset from the transmitter
frequency. When in this mode, the transmitter frequency is locked in but the receiver frequency can
be moved slightly. When the RIT button is pressed, the Power Output display is used for the RIT
display and using the up key and down key sets the frequency offset.

【POW】Set RF output power-adjust.

This feature is used to adjust the output power of the transmitter. The up key and the down key is
used to set the power level. The power output part of the display shows the current transmitter power.

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【V/M】Select VFO or Memory mode.

When in the VFO Mode, the frequency knob will change the frequency. When in the Channel Mode,
the frequency knob will change the channel. In Frequency Mode, the VFO can be continually adjusted
to a resolution of 10 Hz. In the channel mode, the frequency is whatever the channel was
programmed for. There are 127 channels available for use.

【M>V】In memory mode, move current frequency to VFO and switch to VFO mode.

This allows the user to select a known frequency and then use the frequency knob to search for traffic
around that frequency.

【MW】In VFO mode, store current frequency and settings in memory

This will allow you to make up a new channel. By experimenting with the different bands, once you
find something interesting, you can store it as a new channel.

【MC】In memory mode, clear selected memory channel

By clearing the existing memory, you can now store a different frequency in the channel than what was there

before.

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【FIL】Select filter

The radio has three filters optimized for different modes. There is a 500 Hz narrow band filter which
is used for CW. There is a 2.3 KHz filter which is used for SSB. There is a 6 KHz filter used for AM.

【KEY】Select keyer-Manual/Auto L/Auto R

【KSPD】Select keying speed –

Speed is displayed where the power output used to be. The speed can be adjusted from 5 Words per
minute to 75 words per minute. The up key and down key is used to adjust speed.

【TIME】Set internal Clock

When the time key is first pressed, the year will be selected. Use the up key and down key to change
the Year. When the time key is pressed again the month is selected. Use the up key and down key to
change the month. When the time key is pressed again, the day is selected. Use the up key and down
key to change the day. When the time key is pressed again, the hour is selected. Use the up key and
down key to change the hour. The hour can be between 0 and 23. When the time key is pressed again,
the minute is selected. Use the up key and down key to change the minute. When the time key is
pressed one more time, the time setting function is exited.

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【SQL】Select to adjust Squelch level.

Squelch is displayed where the power output used to be. The speed can be adjusted from 0 to 10.
The up key and down key is used to adjust the squelch.

【CMP】Voice Compression settings.

Compression is displayed where the power output used to be. The available compression ratios is 1:1,
2:1, 3:1, 5:1 and 10:1. The up key and down key is used to adjust the compression ratio.

【SPEC】Display Spectrum Analyzer screen

Pressing the SPEC key will get a new screen as described on the next page.

【 ID 】ID call-sign timer

The ID timeout is displayed where the power output used to be. The available times are 5 minutes,
10 minutes, 15 minutes, and 20 minutes and off. Pressing the ID key multiple times changes the
timeout value. When the PTT is first pressed, the ID timer is started. After the timeout as specified is
reached, the screen as shown right below is presented. Pressing the PTT will reset the screen.

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Spectrum Analyzer display screen

【BACK】 Close the spectrum screen and return to previous screen.

While you are in the spectrum analyzer mode, you cannot hear any audio. Pressing the BACK key allows you to hear

what is on the center frequency.

【PEAK】 Select the frequency of the strongest signal in the display

This allows you to automatically select the strongest frequency so you can hear what is at that point.

.

【AMPL】 Changes the screen vertical scale. The range for Steps 1 through Steps 5 is approximate as follows:

Step Number Min Range Max Range

1 S3 S4

2 S3 S5

3 S4 S8

4 S4 S9

5 S5 S9

【SPAN】 Increases the band width of the display. The following table shows Bandwidth versus Total Range.

The bandwidth is the width per pixel.

Bandwidth Total Scanned Frequency Range

500 Hz 64 KHz

1000Hz 128 KHz

2500Hz 320 KHz

5000Hz 640 KHz

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3.2 Using your CS108G+ from the Keypad

3.2.1 Set the current operating frequency from the keypad

On the microphone, press the function button

then input frequency directly, e.g. 14.27, then press the function button F-INPENT again, complete

the setting.

3.2.2: Mode Switching from the keypad

On the multifunction digital microphone in hand, press to complete the mode switching.

3.2.3: Filter Switching from the keypad

On the multifunction digital microphone in hand, press

to complete filter switching.

3.2.4: HRD Software

When you connect your computer via HRD, this radio is compatible with the IC7000 model.

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3.3Extended Interface

【AUX】No function

【SPK】External speaker output

Speaker or Headphone(3.5 stereo Socket); Otherwise it will damage the rig.

Before using the headphone, please decrease the volume.

【KEY】Telegraph Key

The telegraph key is automatic or manual operation.You can switch the keyer mode in

the corresponding menu.

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【ACC】ACC port

Pin Definitions

1： 9V Power Output
2： PTT Signal Output

3： Wave Bands voltage output

4： ALC voltage output

5： External Audio input

6： Ground

Band voltage parameter

【USB】USB port

PC controller firmware update

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【DC IN】 Power port

Power socket polarity, as shown:

Note：Power input range: 12~14.5V DC

Do not exceed the input voltage range or Reversepolarity.

【Ground hole】

【Ground screw】

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3.4.Advanced Menu Settings

CAUTION: THESE SETTINGS ARE DIRECTLY RELATED TO THE CORRECTOPERATION OF THIS RADIO.

PLEASE EXERCISE CAUTION. PLEASE RECORD AND SAVE ALL ORIGINAL FACTORY SETTINGS BEFORE
MAKING ANY ADJUSTMENTS.

3.4.1

In the shutdown state, press and hold the F1 key on the host and turn on (note, do not release) until the screen

displays the data of the engineering menu, as shown below:

1. IF SSB: SSB IF

2. IF CW: CW IF

3. BFO LSB: BFO value LSB mode

4. BFO USB: BFO value USB mode

5. BFO CW: BFO value of the CW mode

6. CW Tone: CW side tone pitch frequency adjustment

7. CW TDly: CW launch delay

8. TOT: Time Out Timer

9. Britns: Brightness:

10. Cntrst: Contrast

11. DDSCLK: System Clock

12. DCLKx6: DDS multiplier settings

13. ST VOL: System Audio Settings

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14. F1 DEF: Custom Key

15. F2 DEF: Custom Key

PLEASE SEE ON LINE MANUAL FOR MORE DETAILS OF THE ABOVE PARAMETERS

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3.4.2user-definedon call sign display

When the power is first applied to the radio, a splash screen is shown that has the name of the
company underneath its trademark. You can change the name of your company to your call sign as
follows:

a. With the power off, hold down the F3 key, and then turn on the power until the special screen

is shown.

b. use the frequency knob to adjust the display character, use the INS key to save that character

and move on to the next character, use the DEL key to erase a character, and use the SAV key to
save the results when you are happy.

c. If you want to use the default, erase all characters and save the blank screen.
d. If you want to just abort the operation before it is saved turn off the power

PLEASE SEE ON LINE MANUAL FOR MORE DETAILS OF SETTING THE CALL SIGN

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3.4.3 ADC on the system check value (It is strictly prohibited to modify or delete the data!!)

With the power off, hold down the F3 key, and then turn on the power until the special screen is
shown.

This screen is used to calibrate the S table.

Do not modify or delete the data!!It may cause the S table display to be inaccurate or not appear.

PLEASE SEE ON LINE MANUAL FOR MORE DETAILS OF THE ABOVE PARAMETERS

25

IV General troubleshooting

The following is a general troubleshooting guide.If you still cannot solve the problem, please call for
assistance or RMA.Do not disassemble the machine or you will lose the warranty.

Fault description

Possible reasons

Solution

Unable to turn on

your CS108G+

Power cord is not connected

Connect power cable

Power is not turned on

Turn on the power

Power cable connection is bad

Replace or repair power cord

Power supply connection reversed

Properly connect the power supply

No reception

Antenna is not connected

Properly connect the antenna

Antenna failure

Replace or repair antenna

No communication

Please confirm the propagation
characteristics of the current band

Other circumstances

Needs repair

Does not

transmit

Antenna is not connected

Properly connected antenna

Low power supply voltage

Please replace the power supply

Lack of power

Please replace the power supply

Antenna SWR value is too large

Please check the antenna

Modulation mode is not correct

Choose the right modulation mode

Other circumstances

Needs repair

Screen has no

display

Power cord is not connected

Connect power cable

Power is not turned on

Turn on the power

Other circumstances

Needs repair

Smoke comes

from equipment

Defective component

Needs repair

26

Microphone

does not

operate

PTT pressed does not turn on
transmitter

Re-connect microphone

Please confirm that the current
frequency is not in the forbidden
band

Reset frequency
No reaction when button is pressed

Re-connect microphone

Other circumstances

Needs repair

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After sales service policy

1. Warranty clause:

The radio has warranty for one year from the date of purchase. This warranty covers only
manufacturing and parts defects. It does not cover damage caused by lightning, excess
voltage on the power supply, accidental damage, or purposeful damage.

If the radio needs warranty repair within two weeks of receiving the radio, Connect
Systems Inc. will pay for the shipping both ways. After two weeks Connect Systems will pay
only for return shipping.

If the radio is not covered under warranty, the customer pays for shipping both ways plus
the cost of the repair.

Sales and Service is through an American Company. You need not send your radio to China
if there is a problem. We fix most of the problems locally and if we cannot that is our problem
and not yours.

2. Warranty limitations:

The following restrictions on warranty services are applicable to the radio and all accessories.
Any other following circumstances, will cancel the warranty:

A． Modification, removal,or maintenance of the internal circuitry, without permission

and authorization;

B． Unauthorized change of product’s embedded software;
C． Immersion in liquid or man-made external damage;
D． Warranty period expired;
E． Product’s serial number is missing, torn or blurred so we cannot determine if the

radio is under warrantee;

F． Product was not bought from Connect Systems Inc or authorized distributor of

Connect Systems Inc.

None of the following conditions, are covered by the warranty:

A. Damage caused by improper use by the user；
B. Damage caused by an accident；
C. Damage due to incorrect testing, maintenance, debugging, or other changes；

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D. Damage is not caused by the material or the quality of production；
E. Damage to the shell or other external components due to improper use.

Contact us: [e-mail]

www.connectsystems.com