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是的,手台开启静噪响应稍慢,这也是我一直不建议用手持机做aprs接受igate用的原因。
6w的瘦客户机不错,主要是系统稳定性和声卡的性能有点影响。
目前avrt系列都是硬解码,igate性能还是稳定的。
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我的2个手台接受都不好用,估计是这个原因。准备出掉
瘦客户机已出掉了,准备入手路由器
今天入手二手2720h,看网上资料这个台子玩aprs不错,通过设置后,aprs tnc接data口副段会自动发射,同时麦克静音,当主段联通时语音优先,副段数据会被抑制,我孤陋寡闻,不知八重洲的7900、8800、或8900是否都有这个功能。
http://www.w4rp.com/ic2720/aprs.htm aprs and packet radio
the icom ic-2720h does an excellent job of supporting aprs / packet and voice simultaneously with its dual band capability.
tom webb, wa9afm/5 provides these tips on using your ic-2720 for aprs and packet:
it is possible to run aprs / packet and voice with the 2720.
the 'left' panel needs to be selected as 'main' band,
you must select the 'right' side of the panel for packet (initial set mode actions, see page 62 in manual);
this will force packet to the 'sub' band on the right.
voice operations will be on the 'main band' on the 'left'.
set the packet speed for 9600 baud (see page 69 in manual). this will accomplish three things;
the mike will be muted during packet transmissions and thus, you won't have to unplug it.
during voice operations, data transmission will be suppressed and voice will have priority;
flashing 's1' will appear in the lower right corner when transmitting on voice.
**note: you can still run 1200 baud packet -- the 9600 baud setting enables the 'dual mode' option.
i use the byonics tinytrakiii. (but this should follow for other tnc's)
using the mini-din 6-pin connector, the cable doesn't require data out
(* you will need to use data out for 9600 baud or the af out for 1200 baud -
there are two audio outputs -- choose the one for your baud rate *)
pin signal
front panel view
1* data in (audio in) *see page 62
2 ground
3 ptt
4 data out - 9600 baud only
5 af out - 1200 baud only
6 psql (carrier detect)
if the ttiii is powered up before the 2720 the yellow cd light will come on steady.
when the 2720 is powered up, the cd light will go off and only come on when a signal is detected.
you will get de-sensing on voice from the aprs transmissions, but it's a fair tradeoff as you're using one radio and antenna. i've been using this configuration for several weeks with great success
* see p. 62 for details on how to toggle data speed between 1200 (afsk) and 9600 bps (g3ruh, gmsk).
connections for 9600 baud connections for 1200 baud