Question Type
No.
Question
Answer
Accessories
1
What's the maximum output power I
should use if I connect the G90 to an
XPA125B amplifier?
5W. It's one of the full band settings of G90.
Accessories
2
Is the data cable included with the
G90 also suitable for other XIEGU
machines?
Yes, all the XIEGU USB-TTL cables are universal.
Accessories
3
How long can the remote head cable
be extended?
When using the remote head, please make sure you are using a high-quality DB9
extension cable. As long as the voltage drop on the cable is small enough, the remote
head can work normally. The longest length recommended is about 6 meters (18 feet).
Accessories
4
Can the headphone port of the G90
be used to drive external speakers?
No, the headphone port can only drive headphones, not passive speakers.
(Any speakers connected must be active powered speakers.)
Accessories
5
Is the headphone output mono or
stereo?
The G90 output is a mono signal, and the left and right channel are combined on the
earphone socket. With a 3.5mm stereo earphone, you can hear sounds on both sides.
If you use a 4-pin earphone, please make sure that the pin definition meets the
requirements, otherwise, there may be no sound, low volume, or other errors.
Accessories
6
Can I connect the G90 to an external
amplifier or a computer, without
using the CE-19?
Yes. You can make a cable by yourself. A pinout and interface definition is included in the
G90 User Manual
Function
7
What is the antenna tuning range of
the built-in antenna tuner in the G90?
The tuner can match an antenna with an SWR of up to 5:1
Function
8
Can the G90 antenna tuner connect
to and match a long wire antenna
directly without a balun?
No, a balun is needed. Otherwise, the tuning range will be reduced.
Function
9
Which bands does the G90 support?
Reception is supported from 500KHz to 30Mhz. Transmission is supported on the 10
amateur bands in this range. (160m, 80m, 60m, 40m, 30m, 20m, 17m, 15m, 12m, 10m)
Function
10
Does the G90 support the new 60
meter band?
Yes, it does.
Function
11
When switching bands, can the non-
amateur band display be turned off?
Yes, it can.
Function
12
Can I get the 6-meter band by
expanding or upgrading firmware?
No. (The hardware does not support this frequency range.)
Function
13
How do I read the ALC readings?
When the G90 is transmitting, the ALC (Automatic Level Control) meter will be displayed
in the upper right corner of the spectrum display area. The normal reading should be
greater than 30, and manual intervention is not needed. If the reading is too low when
using the line input, please increase the input volume appropriately.
Function
14
Is the filter bandwidth adjustable on
the G90?
Yes, both the center frequency and bandwidth of the digital filter can be adjusted.
Function
15
What should the frequency accuracy
be?
±1.5ppm. You can fine tune the current frequency deviation based on a reference signal.
After adjustment, the frequency accuracy could be ± 0.5ppm.
Function
16
Can the G90 send and receive on
different frequencies?
Yes, please turn on SPL (Split Mode).
Function
17
Can the G90 be connected to a PC
serial port directly through the
remote head cable interface?
No, this interface is not suitable for a serial port and this could cause damage to the
interface.
Function
18
What is the "Δ" indicator light used
for ?
In CW receiving mode, this indicator light will blink in sync with the incoming CW signal
when you have the signal tuned to the correct pitch.
Function
19
Are the buttons on the G90 backlit?
No. The buttons below the screen may be dimly lit by light leaking from the display.
Function
20
Can the MIC and LINE IN be used at
the same time?
No. You can use only one input source at a time.
Function
21
Does the MIC interface have a
speaker output signal?
No.
Function
22
Does the G90 have protection against
damage from high SWR (Standing
Wave Ratio)?
Yes, and the standing wave protection threshold is adjustable.
Function
23
What's the level trigger of the G90's
PTT pin?
The G90's PTT pin is triggered by connecting the pin to ground. This is sometimes referred
to as a "Low Level Trigger"
Function
24
Does the G90 support PTT signal
output?
Yes, there is a PTT terminal at the rear ACC port. This control terminal is a bidirectional
control port.
Function
25
Can I control the transmit of the G90
by short circuiting the PTT line on the
MIC input?
No. To control the transmission of the G90 from outside, you need utilize the provided
PTT pin on the rear ACC interface. The CIV command can also control the PTT state of the
device.
Function
26
Why doesn't the S meter show up?
The AGC function needs to be turned on for the S meter to be displayed.
* The hardware of G90 is exactly the same as that of G90S. In the following, G90 is used to represent two models.
Xiegu G90 FAQ from Radioddity
