Make phaser upconverter instruction more correct

Signed-off-by: Egor Savkin <es@m-labs.hk>

src/hw/phaser.md

@@ -29,12 +29,12 @@ phaser0 10+0 10+1 10+2 10+3 10+4 MHz
 3. Run gqrx and choose `Nuand bladeRF SN <number>...`
 4. Input rate 20000000, other settings are default
 5. Lower the gain in `Input options`
-6. When gqrx loaded, start DSP processing with frequency near 2.875 GHz +- frequencies from `artiq_sinara_test`
+6. When gqrx loaded, start DSP processing with frequency near 2.875 GHz +- DUC frequencies from `artiq_sinara_test`
    in `Receiver Options`
-7. Connect the probe through attenuator to the Phaser's ports
-8. You should see 5 tones on `artiq_sinara_test`'s frequencies, like on the picture below
-
-![](../img/phaser_upconverter_gqrx.png)
+7. Connect the probe through attenuator to the Phaser's RF ports
+8. You should see 5 tones on `artiq_sinara_test`'s frequencies, like on the pictures below for RF0 and RF1 respectively:
+   ![](../img/phaser_upconverter_gqrx_rf0.png)
+   ![](../img/phaser_upconverter_gqrx_rf1.png)
 
 
 ### Baseband