There are 3 different variants,
Please refer to the label on your meter to identify which variant you have,
- ASL/EM-LITE 868 only (PCK-S3-005)
V1 (dual ASL PCB) : External antenna on the top, this should be supplied with the meter.
V2 (single ASL PCB) : There is no external antenna.
ASL/EM-LITE GSM (PCK-S3-004)
The ASL 868/GSM top-hat has 2 antenna’s, one on the top (868) and one on the side (GSM) – again both should be supplied with the meter.
3. GEO/EM-Lite 868 only (PP = PCK-S3-006)
For the GEO top-hat, there is a single external antenna (on the side) we do not supply the antenna with this meter.