Operation Manual

Getting Started Graupner HoTT 2.4 05

It is also possible to program the highest channel for the sum signal using the SMART-BOX (Order No.

33700). This is important for certain optional devices which require this signal.

Power supply for receiver 33506, 33508, 33512

When using High Power servos, connect the receiver power supply/s preferably to the vertical ports of

the receiver. If necessary, the servos can be connected to this sockets in parallel with the power supply;

a Y-lead (Order No. 3936.11) is required for this.

The lower sockets (33508 and 33512) should not be used, because an increased voltage drop occurs.

When using a dual power supply, use the sockets on the outside:

Receiver 33506/33508 (GR-12/GR-16): Channel 1 and 6 (or 2 and 5)

Receiver 33512 (GR-24): Channel 11 and 12

The socket marked “T” - telemetry interface - on the left-hand end of the receiver is intended for the

optional telemetry sensors. This socket is also used for loading ﬁ rmware updates in conjunction with the

USB interface. This socket is also polarised; note the small chamfer on one edge. Never use force - the

plugs should engage easily and fully. The socket polarity is also marked on the case: brown wire (-), red

(+) and orange (T).

3.2. Low voltage warning

If the receiver voltage falls below 3.8 V, the transmitter’s RF module generates a low voltage warning in

the form of a “general alarm sound”: a steady beeping at intervals of about one second.

3.3. Temperature warning

If the receiver temperature falls below -10° C or exceeds +70° C, the transmitter’s RF module generates

a temperature warning in the form of a “general alarm sound”: a steady beeping at intervals of about

one second.

3.4. Firmware updates

Firmware updates for the receiver can be transferred via the programming socketvia the programming

socket on the side of the unit, in conjunction with a PC running Windows XP, Vista or 7. For this you

also require the USB interface, Order No. 7168.6, and the adapter lead, Order No. 7168.6A, which are

available separately.

The programs and ﬁ les required for this are available from www.graupner.de in the Download area for

the corresponding products.